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HP RM500SL User's Manual

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1. 9 00 10 00 11 00 12 00 13 00 14 00 BAND SPL dB re overall SPL 15 00 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 BAND CENTER FREQUENCY Hz Figure 1 1 3 octave spectra for the pink noise signal and the noise signal specified in ANSI S3 42 1997 2 2 2 Dual direction pink noise signal Verifit only This unique test signal is available in the dual source Verifit test chamber and for real ear measurements by adding an additional sound field speaker It is similar to the pink noise signal described previously except that the component tones are presented simultaneously from two speakers half from each The level of each tone is independently controlled at the reference microphone Two frequency response curves are generated simultaneously one for each speaker This provides a real time measure of the functioning of the directional features of hearing aids that is independent of compression or noise reduction algorithms Measurement methods which sequentially measure response from different directions work only with these features disabled 2 2 3 Real speech signals Real speech signals are provided in Soeechmap for both REM and S REM measurement modes Four different 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 2 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com digitized speech passages and the single talker
2. LTASS re overall SPL CHILD LTASS re overall SPL ICRA 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 BAND CENTER FREQUENCY Hz Figure 11 LTASS for Speechmap speech signals at average vocal effort Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1GO Page 9 07 05 06 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com 1st Percentile of 1 3 Octave Band SPLs for Speech Signals Average Effort re LTASS for entire passage Hanning window 128 ms average 14 00 12 00 10 00 8 00 6 00 BAND SPL dB re LTASS 4 00 1 LEVEL re LTASS STANDARD 2 00 1 LEVEL re LTASS FEMALE 1 LEVEL re LTASS CHILD 1 LEVEL re LTASS ICRA 0 00 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 BAND CENTER FREQUENCY Hz Figure 12 Level of first percentile for Soeechmap speech signals at average vocal effort 70th Percentile of 1 3 Octave Band SPLs for Speech Signals Average Effort re LTASS for entire passage Hanning window 128 ms average 0 00 5 00 10 00 Ze A N lt Ge ke l H D 15 00 l a N D z lt q M 20 00 25 00 70 LEVEL re LTASS STANDARD 70 LEVEL re LTASS FEMALE 70 LEVEL re LTASS CHILD 70 LEVEL re LTASS ICRA 30 00 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 BAND CENTER FREQ
3. BODY AID MIC LOCATION FM CHEST MIC LOCATION FM BOOM MIC LOCATION 30 00 25 00 20 00 15 00 10 00 BAND SPL dB re NOMINAL 5 00 0 00 5 00 10 00 BAND CENTER FREQUENCY Hz Figure 3 Microphone location effects in dB re nominal band SPL Nominal band levels are band levels for an overall rms level of 65 dB SPL and average vocal effort in a free sound field 3 Analysis of broad band signals Broad band signals contain energy at many frequencies simultaneously Such signals are usually analyzed in a series of narrow frequency bands to produce a spectrum The auditory system functions on a logarithmic frequency scale and analyzes broad band signals in critical bands which approximate 1 3 octave bands Figure 4 Using 1 3 octave bands for analysis of broad band signals allows measured levels to be compared more readily to narrow band behavioral measures such as threshold For this reason analysis of broad band signals in all Real Ear Measurements including S REM in Speechmap is in 1 3 octave bands Other analyzers use narrower analysis bands sometimes having constant bandwidth As shown in Figure 4 this can result in significantly underestimating the audibility or comfort or discomfort of a complex signal It should be noted that in all Real Ear Measurements 1 3 octave band SPL is displayed and reported when saving data to a file at 1 12 octave frequencies which provides curve s
4. The speech envelope when derived in this way has significance in terms of both speech detection and speech understanding Generally speech will be detectable if the 1 level is at or near threshold The Speech Intelligibility Index SII is maximized when the entire speech envelope idealized as a 30 dB range is above masked threshold This will not be an SII of 100 or 1 because of loudness distortion factors but higher SII values will not produce significantly higher scores on most test material The speech reception threshold SRT is attained when the LTASS is at threshold approximately depending on test material and the individual FastFacts 19 5 Speech signal analysis RM500SL User s Guide Version 2 8 Page 87 20 Troubleshooting 20 1 Section overview This section covers common problems encountered when using the RM500SL If you require further assistance note your model and serial number located on the recessed panel and contact your local distributor or Audioscan at 519 268 3313 800 265 2093 USA only 519 268 3256 fax or service audioscan com PLEASE DO NOT SHIP YOUR UNIT BACK TO THE FACTORY In most cases we can courier you a part that you can quickly and easily replace yourself This section covers the following topics 20 2 Self test failures 20 8 Invalid HIT calibration 20 3 HIT high distortion or noise 20 9 No REM ref mic detected 20 4 HIT curves inconsistent 20 10 Invalid REM calibration
5. frequencies The current averaging frequencies are indicated explicitly on test results where space permits and also appear as tick marks on the frequency axis of graphs To change the averaging frequencies see 7 7 ANSI test frequencies This standard also requires some tests with the gain control full on and some with the gain control in the Reference Test Position RTP This requirement applies to both Linear and AGC aids that have a HFA or SPA full on gain greater than the HFA or SPA OSPL90 minus 77 dB Otherwise the RTP is full on If required the RM500SL will pause in its testing and guide you in setting the gain control to the RTP All other controls on the hearing instrument should be set to provide the widest frequency response the greatest gain and the highest maximum output AGC controls or programmable settings should be as designated by the manufacturer At full on gain the Linear and AGC test sequences provide a curve of OSPL90 Output Sound Pressure Level for a 90 dB input SPL the HFA or SPA and peak value of this curve the frequency of the peak and the HFA or SPA gain for a 50 dB input SPL With the gain control at RTP these sequences also provide a frequency response curve with an input SPL of 60 dB Linear or 50 dB AGC the HFA or SPA gain for a 60 dB input SPL the frequency range battery drain equivalent input noise harmonic distortion attack and release time AGC only FastFacts 8 2 ANSI S
6. 20 5 HIT curves differ from specifications 20 11 REM speaker overdriven 20 6 HIT speaker overdriven 20 12 Barcode scanner malfunction 20 7 No HIT reference mic detected FastFacts 20 1 Troubleshooting 20 2 Self test failures Any failure during power on self test P O S T is indicated on screen and further use of the instrument is denied Try the following steps to resolve the failure 1 To access Self test press lt Setup gt then highlight and lt PICK gt Self test 2 If you received a Max out in or a Routing failure remove any hearing aids from the test chamber and rerun self test 3 Unplug all microphones REM amp HIT Rerun self test If self test passes reconnect the microphones one by one running self test each time until a failure occurs If the failure returns display and print the test results and contact Audioscan for help Setup Self test MaxTMSPL_ O Posto o Frequencies O Routing m Pick this button to Test setup ol Gain M display and print ABR nHL to eHL O Frequency response L test results Noise floor L Speakers O Max out in A ANS O Distortion L Display Oo Crosstalk L Network O pick this button to Printing O rerun self test Date amp Time__ O Selftest O FastFacts 20 2 Self test failures RM500SL User s Guide Version 2 8 Page 88 20 3 HIT high distortion or noise High distortion and or noise numbers in an ANSI test v There may be a
7. 3 Press the enlarged end of a probe tube as f far as it will go into the recessed opening TE at the top of the probe module 4 Position the open end of the probe tube in front of the reference microphone inlet and press it between the posts as shown 5 Hold the probe module 5 6 inches 12 5 15 cm away from and directly in front of the loudspeaker Orientation of the probe module is not critical 6 Press lt PICK gt to calibrate The resulting curve should be similar in shape to that shown but may be shifted 5 dB To change the calibration interval highlight amp lt PICK gt Daily or Weekly FastFacts 10 3 Calibration of REM probe microphone RM500SL User s Guide Version 2 8 Page 51 10 4 Calibration check for probe module The calibration curve for the probe module is a comparison of the response of the probe microphone with tube to the response of the REM reference microphone Any change in the curve indicates a change in one of these microphones or the probe tube See 10 3 Calibration of REM probe microphone As part of a regular calibration schedule or to investigate changing calibration curves the REM reference microphone may be checked against a high quality sound level meter 1 Press lt Tests gt then highlight and lt PICK gt REM Manual control 2 Highlight amp lt PICK gt Level then highlight amp lt PICK gt 70 from the drop down list 3 Highlight and lt PICK gt Frequenc
8. 48 9 7 Manual Control porocechure A 49 9 8 Sound level meter using manual control eect eee e eee eeeeceee eee eeeeeeeeaaaaeeeeeeeseteesaaeeeeeees 49 10 Real Ear Measurement Setup cccccccsssssseeeeeeeeeeeeeneeneeneeeeeeeesenseeeeneeeeeeeeeeeeeeeneeeeeeeees 50 10 4 e dee E 50 10 2 REM Calibration tacts eege ee een eege nee en Mee eaten iad eens ee i 50 10 3 Calibration of REM probe microphone ssssssssseeesssssssrrrssssstrirrnntsssttriruntsssstnrnnnnsssstennnnnnn 51 10 4 Calibration check for probe module cece eeeeceeeee cece eee eeeee eee eee eeeeeaaeeeeeeeeeeteccaaaeeeeeeeeeeeeeaaaes 52 10 5 Max TM SPL Setup ccccceceeeeeeceenee eect eee e tee a eee e sete reece aaee tees retest aaaeeeeeeeeegeecaaaeeeseeeeeeeeeaaaes 53 10 6 ABR nHL to CHL setup e cece ee eeeeene eee e eee e ee eeaaaee eee eeeeteeaaaaeeeeeeeetteeaaaeeeeeeeeeeeenaaaes 53 0611 RM500SL User s Guide Version 2 8 Page 3 10 7 Positioning the cet 54 10 8 Positioning the probe e 54 11 REM S ree Seti pe maianen earann deen aa taaa aasaran Aaaa Sa cee cae es 55 11 1 Section Oovenlew eee eec eect eee ete e etna e etter eet t naa anette eee a aaa e deen eee aaaee eee eee aaaeeeee ee teneaaaaes 55 11 2 REM rightorlett ear display 191eugegstengtdtgteugsnsnengk deed 55 11 3 Graph table or 2cc target format 55 a bt DE lee sCale sharia oie weet hs cae cea cae ea eae ea Naa reat a 56 11 5 Hide or show REM cumes eset ee eeeeaaaeeeee
9. Overall 65 0 65 0 65 0 65 0 65 75 0 75 0 84 0 93 0 LTASS for standard speech is from Cox amp Moore 1988 Loud spectrum is from ANSI S3 5 1997 Own voice spectrum is from Cornelisse et al 1991 adjusted to a 1 m reference FastFacts 19 3 Stimulus levels RM500SL User s Guide Version 2 8 Page 85 0611 19 4 Microphone location effects Microphone Location Effects Add to all stimuli in S REM mode Hearing instrument type Frequency BTE ITE ITC CIC BODY 200 0 5 0 3 0 0 0 9 3 0 250 0 5 0 5 0 3 0 8 3 0 315 0 8 0 8 0 3 0 7 3 0 400 1 1 1 0 0 7 0 5 3 0 500 1 2 1 8 0 0 0 4 4 0 630 1 1 2 0 0 1 0 4 3 0 800 0 9 2 0 0 4 0 4 2 0 1000 0 3 To 1 2 0 6 0 0 1250 0 6 0 3 1 6 1 1 0 0 1600 295 0 3 SR 2 0 4 0 2000 4 1 3 8 2 1 3 3 4 0 2500 3 5 5 0 4 8 5 0 3 0 3150 2 8 3 3 3 5 6 9 2 0 4000 3 7 4 3 6 4 8 3 0 0 5000 a2 4 3 6 6 7 6 0 0 6300 1 6 0 4 1 8 4 2 0 0 8000 3 3 1 0 Biles 5 6 0 0 Microphone location effects are added after the overall rms level has been set FastFacts 19 4 Micr
10. Software updating FastFacts 3 1 General operation 0611 RM500SL User s Guide Version 2 8 Page 14 0611 3 2 Input device operation The RM500SL may be operated by means of the built in keypad an external mouse not included or an external QWERTY keyboard not included These devices are used to summon on screen menus and select items from them to operate on screen buttons and to input data The scroll wheel on a mouse will scroll through long lists in list boxes and in Help Clicking the right mouse button generates an image of the keypad which may be operated by the mouse Clicking the left mouse button when the mouse pointer is on a graph will display a screen cursor with a digital readout of X and Y co ordinates Clicking again will dismiss the cursor Function Keypad QWERTY Mouse Summon Help menu lt Help gt F1 Right click Summon Setup menu lt Setup gt F2 Right click Summon Test menu lt Tests gt F3 Right click Summon Session menu lt Session gt F4 Right click Switch between ears or Switch between A B Data lt Left Right gt F5 Right click Print lt Print gt Print Scrn Right click Move across screen columns U Arrows U Arrows Roll Move within a screen column U Arrows U Arrows Roll Select a highlighted item or operate a screen button Round key lt PICK gt key Numeric Enter Key Left c
11. displayed at the end of the test are stored until overwritten by repetition of the same test invalidated by a related test In such cases the message bar will inform you of impending data loss erased by selecting lt Session gt and one of the Erase data choices or the power is turned off Setup data will be retained even after the power is turned off The RM500SL database may be saved as a delimited text file on a networked PC if network file printing has been set up See 6 7 Printing to a network file 1 Press the lt Session gt key 2 Highlight and lt PICK gt Erase all data to generate a list box 3 Highlight and lt PICK gt Export data to file 4 Press lt Continue gt Data from this file may be copied to the clipboard and pasted to most spreadsheet programs After pasting to Excel select Text to Columns in the Data menu and indicate that the data are space delimited need not repeat if file remains open FastFacts 6 8 Data storage to a network file 0611 RM500SL User s Guide Version 2 8 Page 30 7 Hearing Instrument Tests Setup 7 1 Section overview For most tests two completely separate sets of test results labelled A and B may be retained and displayed The appearance of Hearing Instrument Test HIT screens may be changed in several ways Most screens may be formatted to show results in graphical or tabular format The Multicurve screen may be scaled in dB SPL or dB Gain Individual curves may be hi
12. is used rather than Upper Limit of Comfort ULC in referring to the ear canal SPL that should never be exceeded 5 Broadband output limiting targets are not provided FastFacts 17 3 DSL 5 0 in Speechmap RM500SL User s Guide Version 2 8 Page 71 17 4 DSL 5 0 changes The Audioscan version of DSL 5 0 includes provision for bone conduction and ABR threshold binaural targets targets for speech levels from 50 to 75 dB SPL new targets for children targets for adults and new RECD default values for children 1 month to 10 years and adults The UWO child s spectrum has been removed and an own voice spectrum has been added As a result of a re analysis of published data the vocal effort effects for Soft and Average speech levels have been made the same In addition the target symbol has been elongated to indicate that the fit to target is a range not a point The children s LTASSa targets for 70 dB speech differ from those in previous versions of DSL These differences are functions of the hearing loss and age where average RECDs are used and can be more than 10 dB at 250 Hz but are less at other frequencies There are two main reasons for this 1 The introduction of the requirement that amplified soeech peaks should not exceed UCL This has the largest impact at 250 Hz and for losses exceeding 50 dB SPL Targets are generally reduced less than 5 dB for losses under 60 dB HL if RECDs have been measured 2 The introdu
13. 60 50 40 30 Max TM SPL 130 Real ear response Good seal Poor seal Coupler response Average RECD Caused by poor seal in the ear 4000 FastFacts 15 5 RECD results RM500SL User s Guide Version 2 8 ig Presentation Single view 3 Scale dB SPL Age Adult Measure coupler O Coupler SSSI Interval Weekly SO Expires Mon Nov 6 1 00am Measure real ear OO audioscan ce Format Graph fe Last Thu Nov 2 5 49pm Real ear HA2 RECD Avg HA 2 BECH Page 63 16 Insertion Gain 16 1 Section overview Insertion gain is the difference between aided and unaided ear canal SPL REIG REAG REUG It inherently assumes a sound field audiogram For non linear hearing aids REIG is stimulus dependent and the dependency is specific to each hearing aid Insertion gain fitting methods ignore these facts Speechmap is recommended for fitting all non linear hearing instruments Refer to 10 Real Ear Measurement Setup and 11 REM Screen Setup for terminology and information on preparing the system for use and for proper positioning of the client and the probe tube This section covers the following topics 16 2 Insertion gain in SPL 16 6 REAR measurement procedure 16 3 Insertion gain in HL 16 7 SIl calculation in Insertion gain 16 4 Audiometric data entry 16 5 REUR measurement procedure FastFacts 16 1 Insertion gain 16 2 Insertion gain in SPL See 10 Real Ear Meas
14. 7 ANSI test Treouences eee 32 7 8 HIT elen Ee 33 7 9 Calibration of HIT reference microphone ee eee ee eeeceee cece eee eeeeeceaeeeeeeeeeeteeaaaaeeeeeeeeseeesnaaeeeeeees 34 7 10 Calibration check for coupler microphone teste eeeeetaaeeeeeeeeeeeeetaaeeeeeeeeeneed 35 7 11 Coupling the hearing Instrument 36 7 12 Positioning the hearing Instrumert cece eee eeeeceee eee e eee eeeeaaeeeeeeeeeeeeecaaeeeeeeeeeneee 37 8 ANSI 3 22 Hearing Ald TestS nannnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnmnnn 38 8 1 Section e 38 8 2 ER lee 38 8 3 Ee 39 8 4 ANSI 1996 Linear and AGC tests 39 8 5 ANSI 2003 Linear and AGC tests 40 8 6 ANSI test reSultS cc stvavlectoapteanazasient AEN ENEEEENEEEE ENEE 41 8 7 ANSI input OUtput cupves EE 42 8 8 ANSI telecoil Terminologie 43 8 9 ANSI telephone simulator TMFS Test 44 8 10 Telecoil test results 00nnneeeeeeeeseenneeessessenrrrtesertttrrrntssssrtrnnnntsssertrennnasssetnnennnanssennnnnnnnnnnent 45 9 Other Hearing Instrument Tests cccsceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeesneeeeeeeeeeeeeeeesseeeeeeeeeeeees 46 9 1 Section Ovenlew ee 46 9 2 Harmonic distortion 0 cccecceeee eect eee eee e eee reece eee e eee eee aee ester aaaee sees eetneenaaaeeeeeeeennee 46 9 3 Multicurve Grocedure eee rete eae anette needa eee teed deeds eee etn aaaaeeee anette 47 9 4 tute OT 47 9 5 Spectral analysis in MUIICUVE 20 eee cette a a a a A a a Aa EAA 48 9 6 Battery drain Test
15. DSL 5 adult Single view 140 R S 5 tris Instrument 130 _ Mode Ia i Format 110 2 Seale dB Audiometry Presentation Single view SO Graph FO SPL 20 OH Age Transducer UCL RECD BCT Binaural REDD REAR Stimulus Adult Headphone Average Average N A No Average Level SII 37 NA Ale Unaided avg 60 FastFacts 18 6 Fitting to targets for loud sounds RM500SL User s Guide Version 2 8 19 a000 Curve Hide Show OH Page 81 0611 18 7 Fitting to targets for mid level speech 6 Select REAR 3 and set stimulus to Speech std 1 or Speech std 2 and level to 70 Elongated symbols show the target range for 70 dB speech LTASS 7 Adjust gain for mid level sounds so that the middle curve the LTASS falls within the target range Press lt Continue gt to run the complete passage Repeat as necessary Achieving this goal may require adjusting gain for soft speech which will reduce its audibility This may be a necessary compromise with some hearing instruments and for clients with a very narrow dynamic range Speechmap DSL 5 adult Single view audioscan 140 TIET Instrument BTE R Mode S REM Presentation Single view 5 Format Graph 110 e Seale dB SPL 130 120 Audiometry Age Adult Transducer Headphone UCL Average B
16. S Seewald R Moodie K S Pumford J amp Liu R 2005 Clinical protocols for hearing instrument fitting in the desired sensation level method Trends in Amplification 9 4 199 226 Bentler R A amp Pavlovic C V 1989 Transfer functions and correction factors used in hearing aid evaluation and research Ear and Hearing 10 10 58 63 Byrne D 1977 The speech spectrum Some aspects of its significance for hearing aid selection and evaluation British Journal of Audiology 11 40 46 Cole W A amp Sinclair S T 1998 The Audioscan RM500 Speechmap DSL fitting system Trends in Amplification 3 4 125 139 Corliss E L R 1990 The ear as a mechanism of communication Journal of Audio Engineering Society 38 9 640 652 Cornelisse L E Gagne J P amp Seewald R C 1991 Ear level recordings of the long term average spectrum of speech Ear and Hearing 12 1 47 54 Cornelisse L E Gagne J P amp Seewald R C 1991 Long term average speech spectrum at chest level microphone location Journal of Soeech Language Pathology and Audiology 15 3 7 12 Cornelisse L E Seewald R C amp Jamieson D G 1994 Wide dynamic range compression hearing aids The DSL i o approach The Hearing Journal 47 10 23 29 Cornelisse L E Seewald R C amp Jamieson D G 1995 The input output I O formula A theoretical approach to the fitting of personal amplification devices Journal of the Acoustical Societ
17. SPL Add to band SPL for Speech Hz Standard Female Child ICRA Noise Loud Own Voice FM Chest FM Boom 200 56 8 54 9 32 3 52 9 53 22 5 9 0 19 2 250 56 0 53 1 SiS 559 53 3 3 10 7 12 0 22 2 315 53 0 48 4 57 3 56 9 53 9 6 11 0 16 6 26 0 400 57 0 55 8 54 1 SES 53 6 1 10 0 13 3 22 8 500 58 0 57 3 53 2 57 8 53 7 7 10 1 13 2 25 3 630 55 0 58 1 61 2 54 3 53 12 4 10 5 21 0 29 1 800 52 9 54 6 56 5 52 8 53 14 4 10 8 26 4 32 1 1000 51 0 52 0 52 7 50 4 53 15 0 10 5 26 4 32 7 1250 50 5 51 0 45 4 51 3 53 14 8 59 22 0 33 6 1600 48 0 51 1 41 1 48 5 53 15 5 4 0 22 1 33 9 2000 45 0 51 2 39 7 47 0 53 16 2 6 0 21 0 33 0 2500 44 0 49 3 35 5 44 7 53 14 8 6 0 18 2 31 9 3150 42 5 46 0 28 8 43 3 53 14 5 2 0 14 4 30 4 4000 42 0 40 0 31 2 41 1 53 13 2 0 5 11 8 29 0 5000 40 0 36 1 30 6 39 6 53 9 2 1 0 12 4 27 8 6300 41 5 43 5 32 6 33 5 53 4 2 0 0 11 4 26 2 8000 41 5 39 9 35 2 28 2 53 2 7 4 0 11 0 25 8
18. a curve highlight and lt PICK gt its test button To change scale from dB SPL to dB Gain highlight amp lt PICK gt the Scale window FastFacts 9 3 Multicurve procedure 9 4 Multicurve results 1 Output curves for the noise signal are in 1 12 octave bands They will be approximately 18 dB lower than pure tone curves for a linear instrument 2 Gain curves for a linear instrument will be the same for both swept and pink noise test signals 3 For compression instruments both gain and output curves may be expected to differ for the two test signals 4 See 7 Hearing Instrument Tests Setup to change screen appearance Multicurve audioscan EJ Scare Format Graph SO es Stimulus Pink noise Swept Hide Show Oo FastFacts 9 4 Multicurve results 0611 RM500SL User s Guide Version 2 8 Page 47 0611 9 5 Spectral analysis in Multicurve Selecting a stimulus level of 0 dB off in Multicurve presents a spectral analysis of the coupler microphone signal Scale dB SPL or the difference between the coupler and reference microphone spectra Scale dB Gain If the stimulus type is Pink noise the analysis is performed in 1 12 octave bands and displayed in real time Pressing lt Continue gt captures the displayed spectrum If the stimulus type is Swept a swept filter analysis is performed in 1 12 octave bands and displayed at 1 3 octave frequencies Pressing lt Continue
19. and all data is replotted using this reference A physical interpretation of the data is difficult and the use of HL in Speechmap is not recommended All instructions given in this guide assume the SPL Speechmap scale To change the scale Highlight and lt PICK gt Scale to toggle between a dB SPL and dB HL scale FastFacts 11 4 SPL or HL scale 11 5 Hide or show REM curves On screens capable of showing more than one curve you may show or hide test curves Hiding a curve does not erase it To erase curves use the lt Session gt key To hide or show test curve s 1 Highlight then lt PICK gt Curve Hide Show 2 Highlight then lt PICK gt the desired test curve to toggle between Hide or Show The curve will toggle on or off when selected 3 Press lt Continue gt to return to the test screen FastFacts 11 5 Hide or show REM curves 12 REM Manual Control 12 1 Section overview Manual control displays the reference microphone SPL the probe microphone SPL their difference in dB gain and probe microphone signal distortion at any selected 1 12 octave frequency and at a selected input level from 40 to 90 dB in 5 dB steps and at 0 dB off With the stimulus turned off the probe module becomes a dual channel sound level meter with a choice of 1 12 A and C filters in both channels This section covers the following topics 12 2 Manual control measurements 12 3 Sound level meter using REM probe FastFact
20. coupler targets you should use measured or age related RECD Insert phone audiometry with measured RECD and REM verification provides the best fitting accuracy with S REM verification being slightly less accurate Insert phone HL data with age related average RECD is next best This software provides average RECDs for 1 60 months 6 10 years of age and Adult A sampling of age related foam tip HA 2 RECD values is shown below Age Freq 250 500 750 1000 1500 2000 3000 4000 6000 1 month 12 15 15 16 20 23 12 months 1 10 11 11 15 17 24 months 9 10 10 14 15 36 months 8 9 9 13 60 months 7 8 8 13 8 yrs Adult 4 6 7 7 8 13 Values are from DSL 5 0 but differ from DSL in that values for 119 months have been used for ages gt 119 months DSL 5 0 RECDs differ from DSL 4 1 RECDs FastFacts 15 2 RECD facts 0611 RM500SL User s Guide Version 2 8 Page 60 0611 15 3 RECD coupler response Prepare the system for HIT tests See 2 3 Microphone connection 7 9 Calibration of HIT reference microphone Connect the optional RECD transducer to the RECD jack to the left of the test chamber 1 Press lt Tests gt then highlight and lt PICK gt RECD from the REM tests list 2 If a valid coupler response exists go to 15 4 RECD real ear response 3 If no coupler response exists or the measurement interval has been exceeded connect the RECD transducer to the B
21. drain aCcuracn 5 Battery drain resolution sessesseesseerseierrrrersersreriersnees 01 mA ANSI S3 22 1996 and 2003 tests available a OSPL90 a Full on Gain a Reference Test Gain a Frequency Response a Frequency Range a Maximum OSPL90 a Harmonic Distortion a Attack amp Release time a Equivalent Input Noise a Input Output Curves a Coupler SPL Telephone Simulator a Simulated Telecoil Sensitivity a Battery Drain Other tests Available a coupler SPL vs frequency a coupler gain vs frequency a spectral analysis a distortion vs frequency a manual measurement of output gain and distortion Real Ear Spoakol S eech Eed ee A G 1 2 x 3 Probe microphone tube 1 0 mm diameter x 75 mm Frequency Range ccceceeseeeeeeseeseeeeeeees 200 to 8000 Hz Test Stimuli frequency modulated tone tone burst e E pink noise calibrated speech Freq modulation cece eeeee triangular 5 at 36 Hz Stimulus levels for tones 40 85 dB SPL in 5 dB steps Test stimulus accuracy at reference mic for tones 200 2000 FZ inarin ne ainsi alain 1 5 dB SPL 2000 8000 HIZ 205 Sater Bisse elie iets 2 5 dB SPL Equalization Method modified pressure method Analysis frequencies per octave tones 12 Analysis bandwidth speech noleel ee 1 3 octave Measurement accuracy at 1 KHZ eee eects 1 dB Measurement accuracy re 1 kHz e 2 5 dB 5000 8000Hz Measurement Range seee 20 135 d
22. for mid level speech FastFacts 18 8 Open fittings in Speechmap RM500SL User s Guide Version 2 8 Page 82 18 9 FM fitting and verification 0611 FM fitting is complex and strategies are varied and fluid These instructions are intended to provide the general principles involved not a detailed and proven method They assume familiarity with the use of Soeechmap in fitting hearing aids 1 Set up the hearing aid or receiver earpiece as if to fit a hearing aid in REM or S REM mode Set it for environmental microphone EM only operation Set Instrument to BTE or Body to indicate the location of the EM 2 Follow 18 Speechmap Fitting Procedures but in 18 7 Fitting to targets for mid level speech position LTASS 5 dB below the targets see note Avoid controls that change FM gain 3 Switch to FM only operation If you are in S REM mode move the coupler and hearing aid or earpiece outside the test chamber In either REM or S REM mode place the transmitter mic close to the HIT reference mic in the test chamber Turn the transmitter ON and close the test chamber 4 Change Instrument to FM 5 Select an REAR test and with Stimulus at Speech shaped and Level at FM Chest or FM Boom adjust the receiver and or hearing aid to set the LTASS 5 dB above targets see note If possible use controls that don t change EM gain If controls interact you may need to repeat these steps or change the order to
23. graph area and click the left mouse button Click again to turn it off NOTE Noise in the test area may cause erroneous results at low input levels particularly at 250 and 500 Hz Ensure that the test chamber is well sealed and ambient noise is low FastFacts 8 7 ANSI input output curves RM500SL User s Guide Version 2 8 Page 42 0611 8 8 ANSI telecoil terminology The RM500SL test chamber contains an integrated telephone magnetic field simulator TMFS meeting the requirements of ANSI S3 22 that enable the measurement of coupler SPL produced by a hearing instrument with a telephone pickup coil ANSI uses the following terms in telecoil testing RTG reference test gain is the average gain measured with the gain control in the reference test position 1996 or reference test setting 2003 See 8 2 ANSI 3 22 1996 facts and 8 3 ANSI S3 22 2003 facts TMFS Telephone magnetic field simulator A 38 4 mm diameter coil spaced 16 5 mm below a test surfaced driven by a specified test signal Intended to simulate a telephone handset receiver SPLITS Coupler SPL for an inductive telephone simulator SPL developed in a 2cc coupler by a hearing instrument with the gain control in the RTP 1996 or RTS 2003 when the input is the magnetic field generated by a TMFS HFA or SPA SPLITS Average of the SPLITS at HFA or SPA frequencies STS 1996 simulated telephone sensitivity or RSETS 2003 relative simulated equivalent
24. gt After about 4 seconds a message will advise that data is being saved Do not unplug the USB stick until this message disappears 6 To input a file name from a connected keyboard each time you print highlight and lt PICK gt Page setup then highlight amp lt PICK gt Ask File names are limited to 8 characters plus bmp or gif Do not use space or tab in the file name 7 To save all test data as a space delimited text file press lt Session gt then lt Pick gt the Erase all data button to show a list of options Highlight and lt Pick gt Export data to file on USB stick and press lt Continue gt Data from this file may be copied to the clipboard and pasted to most spreadsheet programs After pasting to Excel select Text to Columns in the Data menu and indicate that the data are space delimited need not repeat if file remains open FastFacts 6 5 Printing to a USB memory stick RM500SL User s Guide Version 2 8 Page 28 6 6 Network printer setup To print to a network printer or to a Windows shared printer on the network you must first enable networking See section 5 Networking To print to a printer ona Windows PC connected to a network you must also share the printer on the PC by selecting Start Settings and Printers Then right click on the printer you wish to share and select Sharing Only PCL 3 PCL 5 or PostScript compatible printers are supported In Windows2003 Server you must add permission
25. gt causes the swept filter analysis to be performed in 1 12 octave bands and displayed at 1 12 octave frequencies FastFacts 9 5 Spectral analysis in Multicurve 9 6 Battery drain test The battery drain test automatically measures the battery current when there is no input signal quiescent when the input signal is a 1 KHz tone at 65 dB SPL and the average of the currents when the input signal is 90 dB SPL at the HFA or SPA frequencies Avg 90 dB Battery life is estimated assuming 80 quiescent and 20 Avg 90 dB use Optional battery pills are required With the hearing instrument set as normally used 1 Install and connect the proper battery pill See 2 5 Battery pill use and care 2 Highlight and lt PICK gt Battery drain from Hearing Instrument Tests list 3 Highlight and lt PICK gt Battery type and select from drop down list 4 Highlight and Battery drain audioscan lt PICK gt Hours 177 per day and select from drop oe Pee ee A 1kHz 65dB 2 70 mA down list Avg 90dB 561 mA 5 Highlight and Battery type Zinc air 675 O lt P ICK gt Start Estimated instrument use test J e Hours per day 12 H Estimated new battery life 163 to 224 hours 13 5 to 18 5 days Estimates are for guidance only Battery life varies with use conditions and manufacturer 1kHz 65dB Avg 90dB FastFacts 9 6 Battery drain test RM500SL User s Guide Version 2 8 Page 48 9 7 Manua
26. is calculated by shifting the unaided threshold curve upward by the REIG This estimate assumes a the unaided threshold is a sound field threshold and b a linear aid i e REIG doesn t depend on level The REUR curve uses the right hand SPL scale and is shown for reference only Insertion gain 30 z Average REUR D Target Aided Speech Region 70 dB SPL Max TM SPL 130 r T T Unaided Threshold a ach REUR Scale ee Estimated Aided SF Threshold 4 Threshold lt i Fitting method EDP _Speech a REUR BS Les Audiometry audioscan BTE 1O Graph HL Instrument Format Scale dB Insert Phones Average Transducer intelligibility Index SII REAR ER REIG Stimulus Level SII O Pink noise 55 71 fe CO REUR Unaided SII SII for Target Aided Threshold Pink noise 55 NAL RP SO Kei F Curve e f Sho T T T T T 250 500 1000 FastFacts 16 3 Insertion gain in T T T 2000 HL RM500SL User s Guide Version 2 8 Page 65 0611 16 4 Audiometric data entry Threshold data and parameters may be entered by scanning a barcode on a previous RM500SL or Verifit printout or manually using a mouse the keypad or the numeric keypad on an external keyboard See 2 6 Mouse keyboard barcode scanner and 3 2 Input device operation To enter data from a barcode see 3 3 Barcode data input and 1 Press the barcode trigger a
27. it Curve display Instrument B To hide or show test curve s 1 Highlight then lt PICK gt Curve Hide Show 2 Highlight then lt PICK gt the desired test a curve to toggle between Hide or Show The SR LG curve will toggle on or off when selected Show 20 3 Press lt Continue gt to return to the test Hide zo screen Continue FastFacts 7 5 Hide or Show HIT curves 7 6 1996 or 2003 ANSI standard Automated tests of linear and AGC hearing aids may be conducted according to either the ANSI S 3 22 1996 or ANSI S3 22 2003 test standards For differences see 8 2 ANSI 3 22 1996 facts and 8 3 ANSI S3 22 2003 facts To select the standard to be used 1 Press lt Setup gt then highlight and lt PICK gt ANSI 2 Highlight and lt PICK gt the version of the ANSI standard you wish to use 3 Press lt Continue gt to exit 0611 FastFacts 7 6 1996 or 2003 ANSI standard 7 7 ANSI test frequencies The Frequencies feature allows hearing instruments to be evaluated at the Special Purpose Average SPA frequencies defined by ANSI S3 22 rather than the default High Frequency Average HFA frequencies The choice of SPA or HFA frequencies influences the average OSPL90 average full on gain reference test gain bandwidth and equivalent input noise The frequencies at which distortion is measured are one half the selected SPA frequencies You can also select the frequencies at which attack and release t
28. it is effectively eHL in these cases ABR eHL should be selected See 10 6 ABR nHL to eHL setup and 18 4 Assessment data choices 2 4 Bone conduction Select from N A Enter If Enter is selected an entry screen will be provided after the air conduction thresholds have been entered Continued in 18 4 Assessment data choices 2 FastFacts 18 3 Assessment data choices 1 RM500SL User s Guide Version 2 8 Page 78 0611 18 4 Assessment data choices 2 Continued from 18 3 Assessment data choices 1 5 UCL Uncomfortable Level Select from Enter Average If measured UCL values are entered these values will be converted to real ear SPL and used as real ear saturation response RESR targets Note that DSL 5 0 has changed this term to Upper Limit of Comfort ULC Regardless of the acronym it is a narrow band SPL that should never be exceeded RECD Select from Measure Enter Average If Average is selected age appropriate real ear to coupler difference RECD values will be used If Measure is selected you will be required to measure the client s RECD values or accept values from the RECD test If Enter is selected HA 2 RECD values may be entered and are required at all 9 audiometric frequencies Binaural Select from Yes No Determines if fitting targets will be adjusted for binaural summation effects REDD Real ear to Dial Difference Average this cannot be changed REDD values are similar
29. not a straight line at 45 degrees OSPL90 output SPL for 90 dB input SPL The SPL developed in a 2cc coupler when the input SPL is 90 dB with the gain control of the hearing aid full on ANSI 3 22 Oscillation in audiology refers to the undesired tonal output of an amplifier behaving unstably as a result of feedback whistling Output Compression a form of AGC in which the signal level is regulated at the output OLC Output limiting Compression compression limiting a form of AGC with a high kneepoint and high compression ratio PC Peak clipping a method of limiting MPO by truncating the electrical signal supplied to the output transducer The resulting acoustic signal may not be truncated but will be distorted Probe microphone microphone which may include an extension tube having a sound inlet which is small enough to be acoustically unobtrusive when inserted into the ear canal ANSI S3 46 Pure tone a signal containing one and only one frequency a sinusoidal acoustic signal REAG Real Ear Aided Gain difference in dB as a function of frequency between the SPL or BSPL at a specified measurement point in the ear canal and the SPL or BSPL at the field reference point for a specified sound field with the hearing aid in place and turned on ANSI S3 46 REAR Real Ear Aided Response the SPL or BSPL as a function of frequency at a specified measurement point in the ear canal for a specified sound field with t
30. of the Academy of Rehabilitative Audiology 20 25 38 Seewald R Moodie S T Scollie S amp Bagatto M 2005 The DSL method for pediatric hearing instrument fitting Historical perspective and current issues Trends in Amplification 9 4 145 157 Seewald R C amp Moodie K S 1992 Electroacoustic considerations In M Ross ed FM Auditory Training Systems Characteristics Selection amp Use Timonium MD York Press Sherbecoe R L amp Studebaker G A 2003 Audibility Index predictions of normal hearing and hearing impaired listeners performance on the Connected Speech Test Ear and Hearing 24 1 71 88 Sinclair S T Moodie K S amp Seewald R C 1997 Pediatric Hearing Instrument Fitting Phonak Video Focus 2 Booklet Stofa Switzerland Phonak A G Sinclair S T Seewald R C amp Cole W A 1996 A new real ear fitting system Because no two ears are alike Hearing Review 3 6 46 48 Skinner M W 1988 Hearing Aid Evaluation Englewood Cliffs Prentice Hall Inc Smith D A 1990 Technological report Acoustometry Hearing Instruments 41 11 40 44 Valente M Potts L G Valente M Vass W amp Goebel J 1994 Intersubject Variability of real ear sound pressure level Conventional and insert earphones Journal of the American Academy of Audiology 5 390 398 Valente M Strategies for Selecting and Verifying Hearing Aid Fittings New York Thieme Medical Publishers Inc 1994
31. open end of the probe tube near the HIT reference microphone in the test chamber use putty to hold it and close the test chamber lid Run a Multicurve test at a stimulus level of 70 dB SPL The result should have the shape of a normal REM calibration curve If it does not the REM microphone is defective and must be replaced FastFacts 20 10 Invalid REM calibration 0611 RM500SL User s Guide Version 2 8 Page 91 20 11 REM speaker overdriven REM speaker overdriven This message indicates that the REM speaker is unable to produce the SPL required for a test This is usually the result of a standing wave null at the REM reference microphone caused by reverberation in the environment It warns of a situation that could cause significant measurement errors v Move the RM500SL and client away from walls and hard objects Avoid placing the RM500SL under an overhanging shelf or cabinet Move the RM500SL to the front edge of the table Move the client slightly closer to or further from the REM speaker Position the test ear more directly in front of the REM speaker Apply sound absorbers to nearby reflective surfaces 0611 FastFacts 20 11 REM speaker overdriven 20 12Barcode scanner malfunction If there is no red scanning beam when the trigger is pulled tug on the cable where it enters the scanner If it comes loose easily push it back in until it clicks in place If the scanning beam stays on when the trigger is released or i
32. scale or Aided threshold curve HL scale approximates the dotted target curve For multi level targets match each curve using the stimulus level indicated 9 Press lt Continue gt to complete the test and capture the data See 16 2 Insertion gain in SPL and 16 3 Insertion gain in HL for an explanation of screen curves See 16 7 SIl calculation in Insertion gain NOTE Because it is analyzed in 1 3 octave bands the Noise stimulus produces a REAR up to 12 dB below that produced by the Swept stimulus at the same overall level The REIGs will be similar except at levels which cause non linear operation of the hearing instrument FastFacts 16 6 REAR measurement procedure 0611 RM500SL User s Guide Version 2 8 Page 68 0611 16 7 SII calculation in Insertion gain The RM500SL calculates a Speech Intelligibility Index SII value in for unaided speech at 70 dB SPL REUR the target REIG and for each aided test The calculations use the 1 3 octave band method of ANSI S3 5 1997 without the 160 Hz band and without masking effects Level distortion effects are included but no hearing loss desensitization is applied An idealized speech region of LTASS 15 dB is used The speech recognition associated with a given SII is a function of the test material and the cognitive abilities of the listener There is considerable individual variability in relating the SII to speech recognition especially amongst impaired listeners The fol
33. setup 1 Connect an external printer to the USB port Only PCL3 PCL5 or PostScript compatable printers are supported 2 Press lt Setup gt then highlight and lt PICK gt Printing 3 Highlight amp lt PICK gt USB 4 Highlight amp lt PICK gt Printer details automatic if printer type is set to None 5 Highlight amp lt PICK gt Printer type None 6 Highlight amp lt PICK gt your printer type Select HP Deskjet Color 1 Color 1 for a printer with a single ink cartridge Wp Deskjet Color 2 color 2 for a printer with separate color and black ink cartridges Check Black only for black HP Laserjet Black printouts on a color printer PostScript 7 Press lt Continue gt to exit printer setup and lt Continue gt to exit Setup FastFacts 6 4 Local printer setup 0611 RM500SL User s Guide Version 2 8 Page 27 0611 6 5 Printing to a USB memory stick 1 Plug a USB memory stick into the USB port next to the product label on recessed panel The RM500SL may be either on or off 2 Press lt Setup gt then highlight and lt PICK gt Printing 3 Highlight and lt PICK gt Print to USB file 4 Highlight and lt PICK gt Printer details to change the file type Bitmap bmp or Internet GIF gif and the captured area Full screen Main window full screen without the message line or Active window foreground image only 5 To save a screen image to a file press lt Print
34. should be obtained from your network administrator Internet Protos General You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Subnet Obtain an IP address automatically IP address Subnet mask Pa a Ee hl Default gateway EE Kee FastFacts 5 2 Networking requirements RM500SL User s Guide Version 2 8 Page 22 5 3 Networking setup Check 5 2 Networking requirements and connect the RM500SL to your network 1 Press lt Setup gt then highlight and lt PICK gt Network 2 In the Network poster highlight and lt PICK gt Enable networking 3 If your network supports automatic address assignment DHCP highlight and lt PICK gt Obtain automatically Highlight and lt PICK gt Test connection 4 For manual configuration highlight and lt PICK gt Obtain manually Then highlight each of the 4 boxes in each row and highlight and lt PICK gt the numbers provided by your network administrator from the drop down lists 5 Highlight and lt PICK gt Test connection The RM500SL will prompt you for an IP address of a computer or router on your network In a single PC to RM500SL network this is the IP address of the PC you are connecting to Ma IM SEL _ O Enable networking H O Frequencies _ O Test setup Lei ABR nHL to eHL O Network address Numbers assigne
35. substitute 3 5mm st 1 real ear mic 3 5mm st HIT Chamber Working Space 0 0 ee eee eeeeeeceeeeeeeteeeeeeeeeeees 8 8 x3 5 x1 5 1 2x3 Induction Coils 1 Telephone Magnetic Field Simulator TFMS ANSI 83 22 2003 Battery Simulator oo eerie per ANSI S3 22 2003 Frequency Range ce ceceeeeeeseseeeeeeeeseeneees 200 8000 Hz Test Stimuli tone pink noise calibrated or live speech Test stimulus levels 04 40 to 90 dB SPL in 5 dB steps Test stimulus levels inductive 0 ee 31 6mA m per ANSI S3 22 2003 Test stimulus dieiortion eee lt 2 at 90dB SPL EE lt 0 5 at 70 dB SPL Test stimulus accuracy at reference mic for tones 200 2000 LEE 1 5 dB SPL Test stimulus accuracy at reference mic for tones 2000 8000 HZ riroraa aaa A A AE REE R 2 5 dB SPL Equalization method pressure method Analysis frequencies per octave cecceeceeeeeeteeeteeteteeeeeeee 12 Analysis filter bandwidth Measurement accuracy at 1 KHZ oo eee eee 1db Measurement accuracy re 1 KHz 1 dB 200 5000 Hz ha Amt arate eed hice he 2 5 dB 5000 8000 Hz Measurement range eseese 30 140 dB SPL Harmonic distortion measurement 2nd 3rd or 2 plus 3rd 200 to 4000 Hz Harmonic distortion range Harmonic distortion ACCUPACY ou eee eect eeeeeeee tees 1 Battery drain range sssssessessseersririsrrersrrersrrersrrernrees 0 20MA Battery
36. telephone sensitivity is calculated as HFA or SPA SPLITS minus RTG 60 A positive STS or RSETS indicates greater output when using the telephone than when using the microphone FastFacts 8 8 ANSI telecoil terminology RM500SL User s Guide Version 2 8 Page 43 0611 8 9 ANSI telephone simulator TMFS test ANSI 3 22 requires that the gain control be set to RTP 1996 or RTS 2003 before running this test The reference test gain RTG is required in order to calculate the STS 1996 or RSETS 2003 The easiest way to meet both requirements is to run a Linear or AGC test before running this test See 8 4 ANSI 1996 Linear and AGC tests 8 5 ANSI 2003 Linear and AGC tests 1 First complete a Linear or AGC test then press lt Tests gt 2 Highlight amp lt PICK gt Telecoil 3 Set the aid to T telecoil input 4 Highlight and lt PICK gt Start TMFS test Test setup instructions are displayed 5 Position the aid on the T inscribed on the test chamber floor BTE aids should lie as flat as possible on the test chamber surface while custom aids should be oriented with their faceplate parallel to the top surface if possible and touching it as shown 6 Press lt Continue gt to start the test 7 While maintaining the orientation of step 5 move the hearing instrument around on the test chamber surface to maximize the number shown in the Maximize Average SPLITS Value box 8 W
37. that it is used in such an environment Emissions test Compliance Electromagnetic environment guidance ee The RM500SL uses RF energy only for its RF emissions TE internal function Therefore its RF emissions CISPR 11 H are very low and not likely to cause any interference in nearby electronic equipment RF emissions The RM500SL is suitable for use in all Class A establishments other than domestic and those CISPR 11 directly connected to the public low voltage Harmonic emissions Class A POwer supply network that supplies buildings IEC 61000 3 2 used for domestic purposes Voltage fluctuations flicker emissions Complies IEC 61000 3 3 FastFacts 1 6 Declaration of EMC compliance for the European Community RM500SL User s Guide Version 2 8 Page 9 2 Getting Started 2 1 Section overview This section provides help on unpacking the RM500SL and connecting various components and accessories Note that battery pills SL 110 the RECD transducer SL 100 the barcode scanner VA 120 and a microphone extension cable VA 130 are accessories for the RM500SL and must be ordered separately The following topics are covered in this section 2 2 Unpacking and connecting 2 3 Microphone connection 2 4 Microphone care 2 5 Battery pill use and care 2 6 Mouse keyboard barcode scanner 2 7 External printer auxiliary audio outputs FastFacts 2 1 Getting started 2 2 Unpacking and co
38. to one of these and should remain stable over time Irregularities in the calibration curve may be the result of positioning errors See 7 9 Calibration of HIT reference microphone HIT Calibration audioscan 45 gt Seale dB SPL e Last Mon Jun 5 10 52am _ Interval Weekly ZO Expires FastFacts 7 8 HIT calibration facts RM500SL User s Guide Version 2 8 Page 33 7 9 Calibration of HIT reference microphone Remove any coupler from the coupler microphone before calibration 1 Position the HIT reference microphone opening concentric with the coupler microphone opening and about 1 2 mm from as shown below 2 Close and seal the test chamber by tightening the latch at the front of the lid 3 Press lt Tests gt then highlight and lt PICK gt Calibrate from the Hearing Instruments Test column 4 Highlight then lt PICK gt Daily or Weekly to select the calibration interval 5 Highlight and lt PICK gt Calibrate See 7 8 HIT calibration facts It is recommended that you print a copy of the initial calibration curve and compare it with your daily or weekly curve Any change in this curve indicates a drift in either the coupler or the reference microphone which needs further investigation See 7 10 Calibration check for coupler microphone for an additional check ry L lt ian eiis COUPLER MICROPHONE A REFERENCE MICROPHONE FastFacts 7 9 Calibration of HIT reference microp
39. with frequency and individuals a value between 100 200 ms is likely The Verifit and RM500SL use a 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 6 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com 128 ms analysis time period as an approximation because it also has considerable historic support Because the spectrum of a speech signal varies with time it is necessary to average measurements over several seconds to obtain a stable repeatable result However the effects of adjustments to hearing aid parameters need to be seen quickly in order to be useful for optimization To resolve these conflicting needs speech signals are first presented in a repeating loop with a sound field equalization test prior to the start of each passage A running calculation of the short term speech envelope and average is performed on 2 3 seconds worth of data and is displayed in real time so that the effects of adjustments to hearing aid parameters are easily viewed Pressing the Continue key causes the passage to restart and run in its entirety The envelope and average are calculated over the full passage to provide stable and repeatable data When using live speech as a test signal a Freeze curve function is available to capture the short term spectra for examination and counseling purposes Speechmap Single view audioscan 140 SIE Instrument BTE ZO 130 Mode
40. 2 8 Page 18 3 6 Screen messages The Title bar top line of the display screen informs you of the selected Test e g Multicurve The Message bar bottom line of the display screen suggests the next step ina test or informs you of the state of the instrument or conditions that could affect your data For example it will inform you if the microphones need to be calibrated FastFacts 3 6 Screen messages 3 7 Program memory removal and replacement Operating software is contained on a USB flash drive located in the test chamber under the printer paper roll cradle as shown Software updates are shipped on a CD ROM and must be transferred to the USB flash drive in order to be used This requires that the USB flash drive be removed from the RM500SL and plugged into the USB port on a PC that has a CD ROM drive To remove the USB flash drive ensure that the RM500SL power is off and 1 Open the test chamber and remove the foam from the test chamber floor 2 Pull the USB flash drive straight toward the front of the unit until it is free To install the USB flash drive ensure that the RM500SL power is off and 1 Open the test chamber and remove the foam from the test chamber floor 2 Gently insert the USB flash drive into the USB port with its foam pad down 3 Replace the foam in the floor of the test chamber NOTE that the USB flash drive has been especially configured for the RM500SL Replacing this flash drive with anothe
41. 3 22 1996 facts 0611 RM500SL User s Guide Version 2 8 Page 38 8 3 ANSI S3 22 2003 facts ANSI S3 22 2003 has been designated a recognized standard by the FDA but is not yet mandatory Manufacturers may use either version for reporting test data The most significant change from the 1996 version is the requirement for the hearing aid to be set in its most linear mode for the setting of the gain control to Reference Test Setting changed from Reference Test Position and for all tests except attack and release and input output I O curves These two tests are to be conducted with the AGC function set for maximum effect The AGC test sequence will pause to allow AGC to be set prior to measuring attack and release time Full on gain is determined with 50 dB input SPL 60 dB was formerly an option and frequency response curves are run at 60 dB SPL for Linear and AGC aids The OSPL90 curve the HFA or SPA and peak value of this curve the frequency of the peak the HFA or SPA full on gain are determined at full on gain setting The response curve frequency range Reference Test Gain battery drain equivalent input noise distortion attack and release times are determined at RTS These changes result in more consistent values for reference test gain equivalent input noise and attack and release time See 7 6 1996 or 2003 ANSI standard 8 2 ANSI S3 22 1996 facts and 8 5 ANSI 2003 Linear and AGC tests FastFacts 8 3 ANSI S3 22 2003 fac
42. 5 GB steps Can be used as a 1 12th octave spectrum analyzer by setting stimulus to 0 dB Battery drain A 10 second test of battery current drain with no acoustic input a 1 kHz 65 dB input SPL and an average for 90 dB input SPL at the HFA or SPA frequencies selected in Setup Optional battery pills are required Manual control Coupler and HIT reference mic SPL at selected 1 12 octave frequencies and stimulus SPL of 0 and 40 90 dB in 5 dB steps Can be used as a dual channel sound level meter with 1 12 octave A and C filters This section covers the following topics 9 2 Harmonic distortion 9 6 Battery drain 9 3 Multicurve procedure 9 7 Manual control procedure 9 4 Multicurve results 9 8 Sound level meter using manual control 9 5 Spectral analysis in Multicurve FastFacts 9 1 Other hearing instrument tests 9 2 Harmonic distortion This test measures harmonic distortion at 2 or 3 harmonics with input levels varying from 60 90 dB SPL It also presents the sum of 277 and 3 harmonics as total harmonic distortion THD For hearing aids this differs little from true THD 1 Press lt Tests gt then highlight and lt PICK gt Distortion 2 Refer to 7 11 Coupling the hearing instrument 7 12 Positioning the hearing instrument and 2 5 Battery pill use and care to prepare the instrument for testing 3 Turn the hearing instrument ON 4 Highlight and lt Pick gt Start test 5 Highlight and lt PIC
43. 6 4 Audiometric data entry ccc cece cette eccee eee e eee e ee eeaaaee eee eeeeteeaaaaeeeeeeeeegeecaaaeeeeeeeeeeeeeaaaes 66 16 5 REUR measurement procedure A 67 16 6 REAR measurement Drocecure nnn 68 16 7 SII calculation in Insertion gain cece eeeeeccee eee eeeeeccaeee tees eeteeceaaaeeeeeeeeegeecaaeeeeeeeeeeeeesaaaes 69 17 GT NET ie sates ceo ese ce ceed evedletatsccnans ea reani deas suedvetndezeensecuncsetedergtnsg tance Saakas taeae ERE 70 17 1 Section Oovenlew ee eee ceeeeee eee teeter teeter nena etree eee denen eee aaee ee ee ee eeeecaaaaeeeeeeeeeeeeaaaes 70 172 Speechmap Ee E 70 17 3 DSL 5 0 in SpeeChma 2 00 0 cece eee eee eee eee tread eee e terete aaeee eee eeettecaaaeeeeeeeeeneeaaaes 71 14 Dale O CHANGESs eegen greisser gege EERSTEN EELER EE LSASIEREE 72 E NALSNET in SpeGChM EE 72 16 Using peter 73 17 7 Screen tour unaided screen 74 17 8 Screen tour aided ecreen EE 74 17 9 REMoScbREMrmegde Bue eee eating tata 75 17 10 SII calculation in Gpeechmanp cece eeecceee eee e eee eeeeccaeeee sees eeeecaaeeeeeeeeeeeeecaaeeeeeeeeeneenaaaes 76 0611 RM500SL User s Guide Version 2 8 Page 4 18 Speechmap Fitting Procedures eccccccessssseeeeeeeeeeeeeseseeeeeneeeeeeeeesesseeeneeeeeeeeesneees 77 18 1 Section Oovenlew ee eee 77 18 2 Assessment data emt 77 18 3 Assessment data CHOICES 1 78 18 4 Assessment data CHOICES 2 79 18 5 Fitting to targets for soft speech 80 18 6 Fitting to targets for loud sou
44. 8 0611 RM500SL User s Guide Version 2 8 Page 99 Scollie S Seewald R Cornelisse L Moodie S T Bagatto M Laurnagaray D Beaulac S amp Pumford J 2005 The Desired Sensation Level Multistage Input Output Algorithm Trends in Amplification 9 4 159 197 Seewald R C 1994a Current issues in hearing aid fitting In J P Gagne and N Tye Murray Eds Research in Audiological Rehabilitation Current Trends and Future Directions Journal of the Academy of Rehabilitative Audiology Monograph XXVII Seewald R C 1994b Fitting children with the DSL method The Hearing Journal 47 9 10 48 51 Seewald R C Moodie K S Sinclair S T amp Cornelisse L E 1996 Traditional and theoretical approaches to selecting amplification for infants and young children In Bess F H Gravel J S amp Tharpe A M eds Amplification for Children with Auditory Deficits Nashville Bill Wilkerson Center Press 161 191 Seewald R C amp Ross M 1988 Amplification for young hearing impaired children In M C Pollack Ed Amplification for the Hearing Ilmpaired Third Edition pp 213 271 Orlando Grune A Stratton Seewald R C Ross M amp Spiro M K 1985 Selecting amplification characteristics for young hearing impaired children Ear and Hearing 6 1 48 53 Seewald R C Ross M amp Stelmachowicz P G 1987 Selecting and verifying hearing aid performance characteristics for young children Journal
45. B SPL 200 2500 Hz d Ee ee 30 140 dB SPL 2500 8000Hz ANSI S3 46 1997 tests available a Real Ear Unaided Response a Real Ear Aided Response a Real Ear Occluded Response a Real Ear Insertion Gain Other tests available a Real ear harmonic distortion a Real ear spectral analysis a Manual measurement of output gain and distortion Fitting methods available a Speechmap with DSL 5 NAL NL1 a Insertion gain with NAL RP NAL NL1 Fig6 Pogoll Berger Libby 1 dB 200 5000 Hz 0611 RM500SL User s Guide Version 2 8 Page 93 22 Glossary AGC Automatic Gain Control the means by which gain is automatically controlled by the level of the signal being amplified ANSI S3 22 AGC I input controlled AGC see input compression AGC O output controlled AGC see output compression AGRAM Abbreviation for audiogram ANSI American National Standards Institute Attack Time the time required for HA output to reach 3dB of its steady state level in response to an input step from 55 to 90dB SPL ANSI S3 22 ASP Automatic Signal Processing In hearing aids level dependent frequency response shaping AVC Automatic Volume Control slow acting AGC that attempts to maintain a constant average signal level BSPL Band Sound Pressure Level the SPL within a restricted frequency band BTE Behind The Ear hearing aid Compression a type of AGC in which an incremental change in the input level produces a smaller incremental ch
46. ECH Average BCT NIA Binaural No REDD Average REAR Stimulus Level SII 1 O Speech std 1 Soft 50 37 ite MPO s0 NA 3 Ol Speech std 1 Avg 70 74 II _ Unaided avg 60 19 ao g000 CUVE Hide Show be FastFacts 18 7 Fitting to targets for mid level speech 18 8 Open fittings in Speechmap REM mode should be used for open and vented fittings There are no special real ear SPL targets for open fittings it doesn t matter how the sound reaches the TM the perception is the same However the sound that escapes from a vent or open fitting may be detected by the REM reference microphone interfering with the sound field equalization For this reason the hearing instrument must be muted during sound field equalization 1 Position the client and probe tube and enter audiometric data See 10 Real Ear Measurement Setup 17 Soeechmap 18 Speechmap Fitting Procedures 2 Highlight and lt PICK gt Instrument and select Open from the list 3 Highlight and lt PICK gt a REAR test If this is the first Open test in a session you will be prompted to mute or turn off the hearing instrument and select the Equalize button on the setup poster Otherwise you are reminded to equalize whenever the client or nearby objects are moved After equalization unmute or turn the instrument on and follow the fitting procedures in 18 5 Fitting to targets for soft speech to 18 7 Fitting to targets
47. ICRA distorted speech are provided Each has a duration of 10 15 seconds and may be presented as a single passage or in a continuous loop In order to provide a repeatable speech signal to the device under test the signal path must be equalized prior to the presentation of the speech signal This is accomplished by presenting a 896 ms pink noise burst at the selected speech level 256 ms prior to the start of each speech passage and adjusting a digital filter to provide a flat response at the reference microphone The two Speech std signals are by the same male talker filtered to provide the long term average speech spectrum LTASS recommended by Cox amp Moore 1988 for average vocal effort This is the LTASS assumed in the Desired Sensation Level DSL method of hearing aid fitting The female and child signals have been chosen to provide a range of spectra and are presented as recorded without any processing Overall SPLs of 50 55 60 65 70 and 75 dB at the reference microphone are available Soft and Average levels 50 70 dB SPL have the same spectrum A Loud vocal effort filter is applied to the 75 dB level signals This is shown in Figure 2 The ICRA distorted speech signal is a recording of an English speaking talker that has been digitally modified to make the speech largely unintelligible The resultant signal has many of the properties of real speech but has a harsh sound and lacks harmonic structure The l
48. K gt Harmonics then highlight and lt PICK gt THD 2nd or 3 from the drop down list 6 Highlight and lt PICK gt Input then highlight and lt PICK gt the desired input level 60 90 dB SPL from the drop down list 7 Press lt Continue gt to run the test Distortion will be displayed at 1 3 octaves in graphic and in tabular form FastFacts 9 2 Harmonic distortion 0611 RM500SL User s Guide Version 2 8 Page 46 9 3 Multicurve procedure Multicurve generates 1 to 4 output or gain response curves using either pink noise or swept pure tones at input levels ranging from 40 90 dB SPL and 0 GB off 1 Press lt Tests gt then highlight and lt PICK gt Multicurve 2 Refer to 7 11 Coupling the hearing instrument 7 12 Positioning the hearing instrument and 2 5 Battery pill use and care to prepare the instrument for testing Turn the instrument ON 3 Highlight and lt PICK gt button 1 2 3 or 4 in the Test column 4 Highlight and lt PICK gt the Stimulus window then highlight and lt PICK gt either Pink noise or Swept from the drop down list 5 Highlight and lt PICK gt the Level window for the selected Test then highlight and lt PICK gt a stimulus level from the drop down list 6 Press lt Continue gt to run a sweep or to capture a pink noise curve press lt Cancel gt to abort the test 7 To measure another response curve highlight and lt PICK gt another test button to overwrite
49. S REM JO Presentation Single view SO 120 Format Graph ZO 110 Seale dB SPL 20 193 l ee l l Audiometry O 90 z Age Adult 80 _ Transducer Headphone UCL Average 70 BECH Average Pe _ REDD Average 50 REAR Stimulus Level SII 1 O Speech shape Avg 60 92 20 d 3 0 OO ao E Unaided 100 A i l i i l Curve Hide Show O 10 250 500 1000 2000 4000 8000 Figure 7 Example of speech envelope and LTASS 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 7 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com Speeches iis single view 140 130 120 110 100 90 80 70 60 50 250 500 1000 Speechmap aingle view 140 130 120 110 100 90 80 70 60 50 30 20 10 250 500 1000 Instrument BIE Of _ Mode S REM_ 10 Presentation Single view SO Format Graph ZO Seale dB SPL tO Audlometrg OU Age Adult _ Transducer Headphone UCL Average RECH Average REDD Average REAR Stimulus Level SII 1 Ol Speech shape Avg 60 4 SO 30 Alol Unaided 22 Curve Hide Show CO audioscan D Instrument BTE ZO Mode SBEM ZO Presentation Single view SO Format Graphs ZO Seale dB SPL 20 Audiometry fe Age Adult _ T
50. TE coupler 4 Highlight and lt PICK gt Measure coupler and follow the setup instructions 5 Press lt Continue gt to generate the coupler response curve green When this curve is stable press lt Continue gt to save it 6 Highlight and lt PICK gt Daily or Weekly to toggle the measurement interval for the coupler response For comparison purposes an age related average RECD is shown as a dotted curve on the screen If you have accessed RECD from the REM tests list you may highlight and lt PICK gt the Age box to change the age for this reference curve FastFacts 15 3 RECD coupler response RM500SL User s Guide Version 2 8 Page 61 0611 15 4 RECD real ear response Connect the RECD transducer to the RECD jack to the left of the test chamber Prepare the system for REM tests See 10 3 Calibration of REM probe microphone 2 Press lt Tests gt then highlight and lt PICK gt RECD from the REM tests list 3 If no coupler response exists or the measurement interval has been exceeded go to 15 3 RECD coupler response 4 H a valid coupler response exists highlight and lt PICK gt Measure real ear 5 Refer to 10 8 Positioning the probe tube and insert the probe tube into the ear canal to within 2 5 mm of the eardrum 6 Insert the foam tip into the ear being careful not to advance the probe tube further into the ear canal Insertion depth should be as used with insert phones Allow the
51. UENCY Hz Figure 13 Level of 70 percentile for Speechmap speech signals at average vocal effort 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1GO Page 10 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com Dynamic Range for Speech Signals Average Effort re LTASS for entire passage Hanning window 128 ms average 40 00 35 00 30 00 25 00 20 00 15 00 DYNAMIC RANGE dB 10 00 DYNAMIC RANGE STANDARD 5 00 DYNAMIC RANGE FEMALE DYNAMIC RANGE CHILD gt DYNAMIC RANGE ICRA 0 00 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 BAND CENTER FREQUENCY Hz Figure 14 Dynamic range of Verifit speech signals at average vocal effort 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1GO Page 11 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com
52. Zelisko D L C Seewald R C amp Whiteside S 1992 Comparing three procedures for predicting the ear canal SPL at LDL ASHA 34 10 0611 RM500SL User s Guide Version 2 8 Page 100 24 Appendix 1 AudioNote 2 1 VERIFIT and RM500SL Test Signals and Analysis For additional details of the signals and their analysis see the appended AudioNote Within the European Community EU Authorised representative PC Werth Ltd Audiology House 45 Nightingale Lane London SW12 8SP UK Council Directive 93 42 EEC for Medical Devices 0088 0611 RM500SL User s Guide Version 2 8 Page 101 AUCIONOt 2 Revision 1 0 VERIFIT and RM500SL Test Signals and Analysis Bill Cole BASc PEng 1 Introduction Some useful facts about broad band signals The Verifit and RM500SL are full duplex y Overall SPL is the SPL in a band containing all significant frequency dual channel audio measurement systems _ components of the signal designed for the testing and fitting of all Spectrum level is the SPL in a band 1 Hz wide types of hearing instruments and many V Band SPL is the SPL in a restricted frequency range If the signal is uniform in the band band SPL Spectrum level 10 log bandwidth A spectrum is the band SPL or spectrum level in a series of adjacent bands For a broad band signal the overall SPL is greater than the band SPL assistive listening devices They provide an acoustic test chamber for the testing of devices coupled to stand
53. aai anena daia banendi eieaa 20 4 General SOU EE 20 4 1 SECON OVEIVIOW sissssisizdeendetssusazaserendagnansagsateseerseensunaaaaadeeneneeammndaaageanentedaan deans bensnandsangadsangetenrss 20 4 2 Date and time Setup BAA E E E E E E E E E E E E E E E E 20 4 3 RE EE re EE 21 4 4 SAVING TESESSTUI E 21 E Networking E 22 5 1 Section Ovenmlew ee es aanne 22 5 2 Networking requireMent AA 22 5 3 NetWork Setup mienen ee 23 5 4 Single computer connection ssssssseeesssessssrrretssitrrttssetrttennntssstttttnnntsnstnnnnnnnassennnennnnnsneennnnn 24 6 Printing and Storing RESUILS ccccccceeseseeseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeeeeeeeeeeeeaeeeeeeeeeeeeeees 25 6 1 SECON Be 25 6 2 Internal printer paper Joacdhmg an a i 26 6 3 Barcodes headers and comments ON printouts s ssssssssssseeeerserererrrrrrrrrrrrrrrrrrrrrrrrrrrrrtrertnt 27 6 4 Local elei EE 27 6 5 Printing to a USB memon sch 28 6 6 Network printer setup A 29 0611 RM500SL User s Guide Version 2 8 Page 2 6 7 Printing to a network le 30 6 8 Data storage to a network Te 30 7 Hearing Instrument Tests Setup evEEERSENEEEEEKENENNRSEEEEEERKENEENNSEENEEEEENEEEEEEEENEEEEEEKAE Ee 31 7 1 Section Ovenmlew ee eee 31 7 2 HLT As Ot B GIS EEN 31 7 3 Graph or table format erdege Edgar 31 7 4 Outputior Gain E 31 7 5 Hide or Show HIT cumes eee eeeceeeee eee ee eeaee eset eect eecaaeeeeee ee egeecaaaeeeeeeeeteecdaaeeeeeeeennee 32 7 6 1996 or 2003 ANSI standard 32 7
54. al Spe cificationS ccs scoscesctacsccvecesens sete dezestesazane tocecenesscazanei ode deiasisetandsevecetetivesaiees 93 22 IG SSARY 5 E E E E E E E 94 23 Refere O Sar asc chee dh ch ati ck ech ace ee ee aa Ean EnaA ett 98 24 Appendix 1 AudioNote 2 1 VERIFIT and RM500SL Test Signals and Analysis 101 0611 RM500SL User s Guide Version 2 8 Page 5 The Audioscan RM500SL User s Guide Version 2 8 Bescher Peas A NL1 Single view Main Display Unit e Power Cord Management 00 1000 2000 aooo 8o00 _ Power Switch Hearing Aid Test Chamber gt EIN a e e Keypad 1 About RM500SL 1 1 Section overview This section provides a listing of features new in this software release instructions for accessing the electronic User s Guide contact warranty and trademark information and notices for the European Community Help is available on the following topics by pressing lt Help gt Getting Started 12 REM Manual Control General Operation 13 Sensory Loss Simulator General Setup 14 Occlusion Effect Test Networking 15 RECD real ear to coupler difference Printing and Storing Results 16 Insertion Gain Hearing Instrument Tests Setup 17 Speechmap ANSI S3 22 Hearing Aid Tests 18 Speechmap Fitting Procedures 9 Other Hearing Instrument Tests 19 Speechmap Technical Details 10 Real Ear Measurement Setup 20 Troubleshooting 11 REM Scre
55. alibrator accuracy For a 94 dB calibrator with 0 3 dB accuracy the indicated coupler microphone level should be 94 1 3 dB 11 To stop the measurement highlight and lt PICK gt Stop test FastFacts 7 10 Calibration check for coupler microphone RM500SL User s Guide Version 2 8 Page 35 0611 7 11 Coupling the hearing instrument The RM500SL is supplied with 2 metal couplers a type HA 1 ITE and a type HA 2 BTE Note that an ANSI standard coupler for CICs does not exist These must be tested in the HA 1 coupler When threading the couplers onto the coupler microphone it is very important that they be firmly tightened to ensure a good acoustic seal Avoid twisting the coupler microphone cable turn the coupler not the microphone or unplug the microphone while tightening the coupler BTE instruments are coupled to the HA 2 coupler by means of a 3 8 10 mm length of heavy wall 13 2mm earmold tubing The only purpose of this tubing is to seal the tip of the earhook to the coupler inlet All of the tubing required by ANSI 3 22 is machined into the metal stem of the HA 2 coupler The 13 tubing should be inspected regularly for cracks which will cause feedback Custom instruments are sealed to the HA 1 coupler with putty so that the end of the eartip is flush with the inside of the coupler opening Putty should not extend into the coupler cavity or block the sound outlet of the instrument Vents should be seale
56. always run at 60 dB input SPL FastFacts 8 6 ANSI test results RM500SL User s Guide Version 2 8 Page 41 0611 8 7 ANSI input output curves An input output curve shows the output level of a hearing instrument as a function of input level and frequency It is a steady state pure tone curve and does not reflect performance with complex signals such as speech You may run the tests at any setting of the instrument controls but ANSI S3 22 requires that certain settings be used See 8 2 ANSI S3 22 1996 facts and 8 3 ANSI 3 22 2003 facts The Input Output test allows you to generate up to 4 separate input output curves at each of 5 individual frequencies 250 500 1000 2000 4000 Hz as provided in ANSI S3 22 1 Press lt Tests gt then highlight and lt PICK gt Input Output 2 Refer to 7 11 Coupling the hearing instrument 7 12 Positioning the hearing instrument and 2 5 Battery pill use and care to prepare the instrument for testing 3 Turn the instrument ON set AGC controls or programming parameters as in 8 4 ANSI 1996 Linear and AGC tests or 8 5 ANSI 2003 Linear and AGC tests 4 Highlight and lt PICK gt Curve 1 Test setup instructions will be displayed 5 Press lt Continue gt to generate a set of 5 input output curves 6 To measure another set of 5 input output curves highlight and lt PICK gt another Curve 7 To summon a cursor to determine curve values position the mouse pointer on a
57. and Insertion Gain tests To enable disable this feature 1 Press lt Setup gt then highlight and lt PICK gt Test setup 2 Highlight and lt PICK gt Save test setup to toggle between Yes and No 0611 FastFacts 4 4 Saving test setup RM500SL User s Guide Version 2 8 Page 21 5 0611 Networking 5 1 Section overview The RM500SL may be connected to a network using a Cat 5 RJ 45 cable This allows screen images to be printed on a network printer or on a shared printer on a networked PC Images and underlying data may also be saved to a shared folder on a networked PC See 6 Printing and Storing Results for details The RM500SL may also be connected to a single computer using a network hub This section covers the following topics 5 2 Networking requirements 5 3 Networking setup 5 4 Single computer connection FastFacts 5 1 Networking 5 2 Networking requirements The RM500SL may be connected to a network using a Cat 5 RJ 45 cable The network connector is next to the serial number label on the recessed panel For automatic address assignment the network must have a Dynamic Host Configuration Protocol DHCP server For manual addressing the remote computer must be running Windows 95 or higher File and Printer Sharing for Microsoft Networks must be enabled and the TCP IP Connection must be configured so that the IP address of the remote computer is on the same subnet as the RM500SL These settings
58. ange in the output level CR Compression Ratio the ratio of incremental change in input SPL to the resulting incremental change in output SPL Used to characterize steady state AGC action can be a function of input level duration and frequency CROS Contralateral Routing Of Signals a type of hearing aid in which the microphone is at the ear opposite to the one receiving the amplified sound CORFIG Coupler Response for Flat Insertion Gain the transformation added to real ear insertion gain to obtain 2 cc coupler gain Assumes linear amplification Coupler a device used to acoustically couple an earphone or hearing aid to a measurement microphone and to provide an acoustic load DSL Desired Sensation Level Method a systematic eardrum SPLogram approach to the hearing aid fitting process that seeks to ensure amplified speech will be audible and comfortable while loud sounds will not be uncomfortable Directional hearing aid a hearing aid for which the gain is dependent on the direction of sound incidence when measured under free field conditions ANSI 3 22 Equalization process of controlling the SPL or band SPL of the stimulus as a function of frequency at the field reference point ANSI S3 46 Expansion a type of AGC in which an incremental change in the input level produces a larger incremental change in the output level FM frequency modulation a method of transmitting information in which the frequency of a radio w
59. applied to the earmold or custom instrument shell in the vicinity of the probe tube will make insertion easier and prevent slit leaks around the tube 3 Turn the hearing aid OFF 4 Press lt Tests gt then highlight and lt PICK gt Occlusion 5 Highlight and lt PICK gt Start test to start the test Start test changes to Stop Test 6 While the client vocalizes ee in a normal voice highlight and lt PICK gt Stop test to stop the test and freeze the screen A red occlusion bar indicates an occlusion problem a yellow bar indicates a possible problem and a green bar indicates no problem 7 Increase venting and repeat the test until a green bar is obtained Stimulus Off Stimulus Off Filter C Weighted Filter C Weighted Start test Oj Start test SCH Stimulus Off Filter C Weighted Start test 20O Probe microphone 53 5 dB Probe microphone 62 5 dB Probe microphone 67 0 dB ECOLE Pe Ae eae eve Sun Ue evr en E eS eu Ll D 10 20 30 40 50 60 70 80 90100110120130 O 10 20 30 40 50 60 70 80 90100110120130 O 10 20 30 40 50 60 70 80 90100110120130 Reference microphone 49 0 dB Reference microphone 51 0 dB Reference microphone 50 5 dB Lp La bets Sn lB Lp ee LOGI NL LOR OL fit fl Sn Le GLI LL 0 10 20 30 40 50 60 70 80 90100110120130 D 10 20 30 40 50 60 70 80 90100110120130 0 10 20 30 40 50 60 70 80 90100110120130 Occlusion 45 dB Occlusion 11 5 dB Occlusion 16 5 dB FastFacts 14 1 Occlusion effect meas
60. arcode Entry poster will appear on the Left Right screen A green checkmark on the poster Age Adult shows which data have been accepted A Transducer Headphone message will advise if the barcode does not Threshold Ti Ti contain data for the screen you are viewing UCL Til i 4 When all desired data have been accepted AEW H E select Done to apply the data See 6 3 Barcodes headers and comments on printouts Barcodes on some Grason Stadler Cancel e printouts may also be scanned into the RM500SL FastFacts 3 3 Barcode data input RM500SL User s Guide Version 2 8 Page 16 0611 3 4 Keypad keys Keypad Button Function lt Help gt Summon context sensitive Help Screen lt Setup gt Summon Setup Menu containing a list of RM500SL features that can be modified Any modifications made will be maintained after power off lt Tests gt Summon Test Selection Menu containing a list of the available test procedures lt Session gt Summon Session Data Menu to erase or export data lt Left Right gt Used to alternate between ears or A B Data lt Print gt Print on internal or external printer or print to file U Arrows Move across screen columns U Arrows Move within a screen column Round Key lt PICK gt key Select a highlighted item or operate a screen button lt Continue gt Proceed from current state lt Canc
61. ard 2 cm couplers as well as sound field speaker s and the band SPL is greater than the spectrum level For a pure tone for real ear measurement REM of hearing the overall SPL the band SPL and the spectrum level are the same aid performance The Verifit test chamber V A white noise signal has a spectrum level that is independent of contains two loudspeakers for the frequency i e constant SPL per Hertz functional testing of directional hearing V A pink noise signal has a spectrum level that is inversely proportional instruments Test signals are delivered to ___ to frequency i e constant SPL per octave the device under test via the test chamber A fractional octave band e g 1 3 octave has a bandwidth that is lobdspeakens Hie test chamber Weplony GE Hae spectrum when analyzed in fractional magnetic field simulator TMFS the test ss Ne S chamber magnetic field test loop Verifit y A critical band is a band within which the loudness of a continuously only or the sound field loudspeaker s distributed signal of constant SPL is independent of bandwidth Device output signals are measured in the 2 cm coupler via the coupler microphone or in a real ear via the probe microphone Data from the 2 om coupler may be viewed as coupler SPL coupler gain or as estimated SPL in the ear canal simulated real ear measurements S REM Data from the probe microphone may be viewed as ear canal SPL as ear canal SPL re normal hearing threshol
62. atter may be significant for hearing aids which use this property of speech to control noise reduction schemes The LTASS is similar to the Speech std signals up to 5 kHz The test systems provide a simulated real ear mode S REM in which measurements made in the 2 cc coupler in the test chamber are converted to estimated real ear SPL In this mode the effects of hearing aid microphone location need to be included in the test signals so spectra are further altered to include the microphone location effects shown in Figure 3 LOUD VOCAL EFFORT EFFECT re nominal band SPL 20 00 15 00 10 00 5 00 BAND SPL dB re NOMINAL 0 00 5 00 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 BAND CENTER FREQUENCY Hz Figure 2 Loud vocal effort effect in dB re nominal band levels Nominal band levels are band levels for an overall SPL of 65 dB This shaping is applied to the 75 dB SPL speech and ICRA signals In addition to these well controlled and repeatable signals live speech may be used as a test signal It will of course be unequalized and at an uncontrolled level 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 3 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com MICROPHONE LOCATION EFFECTS re nominal band SPL a BTE MIC LOCATION 40 00 nu __4 ITE MIC LOCATION ITC MIC LOCATION e CIC MIC LOCATION 36 00 4
63. audioscan SL RM500SL REAL EAR HEARING AID ANALYZER USER S GUIDE Version 2 8 November 2006 Table of Contents 1T AboutRM500Sb mmea aaaea aaea a aa naa aaa a ae aE KAA a hasta nail bites 6 1 1 eene 6 1 2 New in this software release 7 1 3 Electronic users Quide 2 4nnei sitesi mata 7 1 4 Warranty Trademarks Acknowledoemente citi iiiiiiiiiiiiienenneeereereees 8 1 5 Notices for the European Community 0 0 0 0 ccccccceceeeee cece eee eeeeceee sete eee teecaaaeeeeeeeeeeteccaaeeeeeeeeetee 9 1 6 Declaration of EMC compliance for the European Community 9 2 Ee SU ln EE 10 2 1 E eine 10 2 2 Unpacking and connecting cece eect eee eee eee eee enna rete teeta aee eee eee nneeaaaeeeeee seen 10 2 3 Microphone connection cece eee eetceee teeter eee e caer teen eet a deen eee ered aaaeeeee ee etneeaaaeeeeeeeennee 11 2 4 Microphone Careyn a aaa a 12 2 5 B tt ry pill Use Re TEE 12 2 6 Mouse keyboard barcode scanner 13 2 7 External printer auxiliary audio OUTPUTS ceeceeeeeeeeeeeceeeeeeeeeeeeeecaaeeeeeeeeeeeeeaaaeeeeeeeeeeeeaaaes 14 3 General Operation eegene 14 3 1 eet Be NEE 14 3 2 Input device operation eee ee eee ee eee 15 3 3 Stee Ee ata i TEE 16 3 4 EIN 17 3 5 Menue lst aNd DUOS a a aN 18 3 6 Een E 19 3 7 Program memory removal and replacement cccccceccceeeeeeeeeeeeeecceeeeeeeeeeeeecaeeeeeeeeeeeeeaaaes 19 3 8 Software UPCALI imire aiaiai aaea aina edau anaana aaeain tandade i
64. ave carrier is varied modulated by the information signal Also a method of reducing standing waves ina sound field in which the frequency of a test tone carrier is varied by a low frequency triangle or sine wave FM System an assistive listening device consisting of a microphone an fm radio transmitter and an fm receiver The microphone and transmitter are worn by the speaker and the receiver is worn by the listener FOG Full On Gain gain for a 50 dB input SPL with the gain control set to maximum ANSI 3 22 Gain in dB output sound pressure relative to input sound pressure expressed in decibels gain 20log output sound pressure input sound pressure also gain output SPL input SPL Gain control a manually or electronically operated control for the adjustment of overall gain ANSI 3 22 HA 1 Coupler a coupler having a volume of 2 cubic centimetres with direct access to the cavity Used for testing in the ear and in the canal hearing aids can also be used to test behind the ear hearing aids with a custom earmold attached Aka the ITE coupler HA 2 Coupler a coupler having a volume of 2 cubic centimetres with access through a rigid tube When used for testing BTE hearing aids the rigid tube consists of 18 mm of 3 mm tubing plus 25 mm of 2 mm tubing ANSI S3 22 When used for calibrating insert earphones the 2 mm tubing is not used ANSI 3 6 Aka the BTE coupler Harmonic a component of a tone complex
65. cal characteristics but indicate the adjustment range possible for these parameters If you are unsure which test sequence to run try AGC first If attack and release times are all near zero the instrument is probably linear FastFacts 8 5 ANSI 2003 Linear and AGC tests RM500SL User s Guide Version 2 8 Page 40 0611 8 6 ANSI test results ANSI 3 22 1996 AGC 120 250 500 Averaging frequencies A A 1000 2000 4000 Start test OSPLSO curve Average gain 50dB Average gain _ 1600 Hz distortion 65dB 1 8000 HFA SPA audioscan Graph SO dB SPL Format Scale fe Volume control full on Max OSPLS0 dB 118 1400 Hz Average OSPL90 114 dB 52 dB Volume control at RTP Response curve 50dB 60dB 37 dB Frequency range lt 200 6300 Hz Battery drain 0 73 mA Equivalent Input noise 34 dB 500 Hz distortion 70dB 4 800 Hzdistortion 70dB 1 Ki Frequency Attack Release 250Hz 195 670 500Hz 190 1000Hz 185 2000Hz 170 4000Hz 190 1000 1600 2500 Hz ms ms ms ms ms In 1996 tests Full on average gain is measured at 50 dB SPL average gain at RTP K is usually but not always measured at 60 dB SPL and the frequency response I is run at 60 dB SPL for linear aids or at 50 dB SPL for AGC aids In 2003 tests Full on average gain is measured with a 50 dB input SPL average gain at RTS is always measured at 60 dB input SPL and the frequency response curve is
66. ch test using a 256 ms 50 55 dB SPL multi tone complex or a 256 ms chirp depending on the test to follow Drive levels at each frequency are then set to achieve the desired band levels at the reference 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 1 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com microphone 2 2 Broad band signals 2 2 1 Pink Noise signal The pink noise signal is available for Multicurve 2 cm coupler gain and output frequency response measurements and for Insertion gain and Speechmap real ear measurements It is a pseudo random signal composed of 1024 simultaneous tones summed to provide a crest factor of 12 dB The spectrum of the pink noise signal is controlled by the reference microphone in conjunction with a digital feedback loop with a frequency resolution of 1 12 octave and a response time of about 1 3 of a second Pink noise was selected as a test signal because it has equal energy per octave producing a flat spectrum when analyzed in 1 12 or 1 3 octave bands Figure 1 shows the 1 3 octave spectrum of the pink noise signal and the noise signal specified in ANSI S3 42 1997 Note that the ANSI S3 42 1997 spectrum represents speech peaks not the long term average 1 3 OCTAVE SPECTRA for the PINK NOISE SIGNAL and ANSI S3 42 NOISE re overall SPL 8 00 Band Level re overal SPL Pink Noise Band Level re overall SPL ANSI S3 42
67. creen instructions Remove the empty spool from the paper tray and any remaining paper from the printer Hold a new roll in front of the paper tray with paper feeding from the top of roll Insert the paper s leading edge into the lower slot at rear of tray Feed the paper by highlighting the on screen Paper Feed button and pressing lt PICK gt Advance the paper until it comes out of the upper slot 8 Place the roll in the paper tray and advance another 10 25 cm of paper Lower the printer head using the small black lever Press lt Continue gt to print or lt Cancel gt to cancel the print job If nothing shows on the paper when you press lt Print gt and the paper is coming out check that the glossy side is up as it comes out of the printer Thermal paper may darken if stored for prolonged periods at elevated temperatures and lose contrast if subjected to light Keep long term supplies and printouts in a cool dry place out of direct light FastFacts 6 2 Internal printer paper loading RM500SL User s Guide Version 2 8 Page 26 6 3 Barcodes headers and comments on printouts The date and a header such as facility or patient name may be added to printouts Barcodes representing hearing threshold UCL and RECD where applicable may be added to printouts of Soeechmap Insertion gain and RECD tests Lines for hand written notes or typed comments may also be added 1 Connect a computer keyboard to
68. ction of frequency between the SPL or BSPL at a specified measurement point in the ear canal and the SPL or BSPL at a field reference point for a specified sound field with the ear unoccluded ANSI S3 46 REUR Real Ear Unaided Response SPL or BSPL as a function of frequency at a specified measurement point in the ear canal for a specified sound field with the ear canal unoccluded ANSI 3 46 Reference microphone microphone used to measure the stimulus level in the measurement process or to control it in the equalization process Release Time the time required for HA output to fall to within 4dB of its steady state level for an input step from 90 to 55dB SPL ANSI 3 22 REM Real Ear Measurement RTG Reference Test Gain the HFA gain for a 60 dB input SPL with the gain control at RTS ANSI 3 22 Reference Sound field the calibration point of a sound field measurement RTS Reference Test Setting of the gain control for a 60 dB input SPL the setting of the gain control required to produce an HFA gain within 1 5 dB of the HFA OSPL90 minus 17 GB If the full on HFA gain is less than the HFA OSPL90 minus 17 dB the RTS is the full on setting of the gain control ANSI 3 22 RSETS Relative Simulated Equivalent Telephone Sensitivity difference in dB between the HFA SPLITS SPA SPLITS and the RTG plus 60 in the M microphone mode RSETS HFA SPLITS RTG 60 Saturation in a hearing aid the limiting o
69. ction of new default average RECDs Where average RECDs are used this generally results in a target decrease in addition to that caused by the change in 1 above In evaluating the impact of these new targets it must be remembered that in most cases the reduction in SII will be 5 10 points An SII change from 70 to 60 predicts a reduction of only 1 on the connected speech test while a change from 60 to 50 predicts a reduction of 4 See 17 10 SII calculation in Soeechmap for more information on the SII For more information on the changes in DSL 5 0 visit www audioscan com Audioscan assumes no responsibility for the validity of these changes that responsibility rests with the National Centre for Audiology FastFacts 17 4 DSL 5 0 changes 17 5 NAL NL1 in Speechmap The NAL NL1 procedure seeks to amplify speech such that all bands of speech are perceived with equal loudness while maximizing speech intelligibility and ensuring that the wearer perceives speech to be no louder than that which a normal hearing person would perceive Although NAL NL1 states its goals for speech it derives insertion gain targets assuming noise as a verification signal Because it is more accurate to verify a non linear fitting using the signal for which the procedure was developed Audioscan converts the NAL NL1 insertion gain targets to LTASS targets for amplified speech in the Spoeechmap environment resulting in Speechmap NAL NL1 The conversions use the sa
70. ctroacoustic data DSL was developed by the National Centre for Audiology NCA London Ontario Audioscan has implemented DSL within its Speechmap fitting system since 1994 In 2005 DSL underwent an extensive revision This has resulted in changes to speech targets for children These changes will be more significant when the individual RECD values have not been measured for the child being fitted See 17 4 DSL 5 0 changes and www audioscan com for details of the changes The Audioscan version of DSL 5 0 may differ from others in the following ways 1 DSL 5 0 uses RECD values for ages gt 119 months from a different source than for ages lt 119 months Audioscan has used the RECD values for a 119 month old for ages gt 119 months so all values come from the same study 2 Input output curve targets and compression threshold targets are not provided Such steady state parameters are of little value in estimating amplified speech levels Matching amplified speech to the LTASS targets at levels from 50 to 75 dB SPL provides much better assurance that fitting goals are being met 3 There is no provision to input the number of compression channels This may be useful when the signal used for verification is not the signal for which the targets were developed It is irrelevant when using real speech signals to match speech targets and when using narrow band signals to match narrow band maximum output targets 4 The term Uncomfortable Level UCL
71. d i e dB HL as insertion gain or as ear canal SPL in the context of an auditory area Speechmap 2 The test signals Four types of test signals are currently available These are tonal signals pseudo random noise digitized real speech signals and the ICRA distorted speech signal Test signals are generated in real time by the digital signal processor DSP or played from 16 bit binary audio files stored in the on board flash memory In the Verifit these audio files are up loaded from the internal compact disc CD drive at power up In order to provide a repeatable acoustic signal to the device under test a reference microphone is used in conjunction with a digital control loop to maintain the desired band level at each frequency Live audio speech music etc may also be used as a test signal but it is not controlled for spectrum or level 2 1 Narrow band signals 2 1 1 Pure tones Pure tones are used in the ANSI hearing aid tests in Multicurve 2 em frequency response tests gain or output in 2 cm and real ear single frequency manual tests in real ear insertion gain tests and in tone burst maximum output MPO tests Frequencies used are 1 12 octave except for the MPO test which uses 1 3 octave frequencies Levels from 40 to 90 dB SPL are available at the reference microphone Control of the level at each frequency is maintained by measuring the frequency response of the signal path to the reference microphone 256 ms before ea
72. d at the faceplate end It is very important that the instrument be well sealed to the coupler Excess low frequency output is usually due to open vents or a poor seal to the coupler Open fit instruments must use the coupler and coupling system specified by the manufacturer This may involve a hook that replaces the open fit tubing or an adapter tube that may be sealed to the opening of the HA 1 coupler with putty Receiver in canal instruments are coupled to the HA 1 coupler using putty to seal the receiver module or soft tip to the coupler opening Excess low frequency output is usually due to open vents or a poor seal to the coupler For health reasons hearing instruments should be clean before putty is applied and putty should be replaced frequently FastFacts 7 11 Coupling the hearing instrument RM500SL User s Guide Version 2 8 Page 36 0611 7 12 Positioning the hearing instrument The hearing instrument should be coupled to the appropriate coupler and a battery or battery pill installed See 7 11 Coupling the hearing instrument and 2 5 Battery pill use and care Place the instrument and coupler in the test chamber so that the rla microphone opening s of the instrument are on the crossbar gt gt within the test zone L Position the HIT reference microphone as close as possible to the front facing microphone opening of the hearing instrument without touching it Close and seal the test chamber FastFac
73. d by network administrator Speakers CO Obtain automatically 5 O for the RIM500SL aa o SE Display O IP Address 1721 30 7O 1 7O 11040 Network IO Network 1721 0 30 toi Soo io Printing O Broadcast 1721 30 7O 1 10 255 0 Date amp Time CO Netmask 255 O 255_O 255 O 0 10 Self test Lei CD ROM O Test connection fei FastFacts 5 3 Networking setup 0611 RM500SL User s Guide Version 2 8 Page 23 0611 5 4 Single computer connection The computer must be running Windows 95 or higher with a functioning network card connected to one port on a Ethernet network hub or switch Connect a Cat 5 RJ 45 cable from a hub port to the RM500SL connector To set up the PC 1 Right click Network Neighborhood or My Network Places amp select Properties 2 Right click Local Area Network Connection amp select Properties 3 If Internet protocol TCP IP is not installed install it from your Windows disk 4 Highlight Internet Protocol TCP IP amp select the Properties button 5 Check Use the following IP address and enter the following in the IP address box 172 30 1 1 Enter 255 255 255 0 in the Subnet mask box On the RMS500SL see IP Address 1724O0 30 10 1 rell 2 5 3 Networking setup d LO IO d and manually configure Network 1724 O 30 zo 1 10 0 10 SC Broadcast 172 O 30 0 1 10 25510 Netmask 255_O 255 0 2550 0 ZO FastFacts 5 4 Single computer connec
74. dden but not erased This section covers the following topics 7 2 HIT A or B display 7 8 HIT calibration facts 7 3 Graph or table format 7 9 Calibration of HIT reference microphone 7 4 Output or gain scale 7 10 Calibration check for coupler microphone 7 5 Hide or Show HIT curves 7 11 Coupling the hearing instrument 7 6 1996 or 2003 ANSI standard 7 12 Positioning the hearing instrument 7 7 ANSI test frequencies FastFacts 7 1 Hearing instrument tests setup 7 2 HIT Aor B display For most tests two completely separate sets of test results labelled A and B may be retained and displayed To switch between A and B test results press the lt Left Right gt key FastFacts 7 2 HIT A or B display 7 3 Graph or table format Except for Distortion Input Output Battery drain and Manual control screens you have the option of selecting either a graphic or tabular format To change the data format highlight then lt PICK gt Graph or Table FastFacts 7 3 Graph or table format 7 4 Output or gain scale On the Multicurve test screen you have the option of displaying test results in SPL dB or gain dB To change the scale highlight then lt PICK gt dB SPL or dB Gain FastFacts 7 4 Output or gain scale 0611 RM500SL User s Guide Version 2 8 Page 31 7 5 Hide or Show HIT curves On screens capable of showing more than one curve you may show or hide test curves Hiding a curve does not erase
75. de to either adjust the maximum output limiting of the hearing instrument or increase the Max TM SPL setting following the steps above If the MAX TM SPL limit has been disabled a notice will appear on each real ear screen Also a message reminding you that the MAX TM SPL limit has been disabled will appear when you select a real ear test FastFacts 10 5 Max TM SPL setup 10 6 ABR nHL to eHL setup Estimated Hearing Level eHL An estimate of the behavioral pure tone threshold that accounts for a measured ABR threshold Normalized Hearing Level nHL a Stimulus peak to peak equivalent SPL pe SPL at ABR threshold relative to the average stimulus pe SPL at ABR threshold of a normal hearing jury OR b stimulus SPL at ABR threshold relative to the average stimulus SPL at behavioral threshold of a normal hearing jury for the same stimulus Note that in this latter case nHL is equivalent to eHL In Speechmap DSL you have the option of entering ABR thresholds in either eHL or nHL If eHL is selected the threshold is treated as if it were a behavioral pure tone threshold If nHL is selected the entered data will first be converted to eHL before SPL threshold and fitting targets are calculated To do this appropriate eHL to nHL conversion factors must be applied You can choose to apply default conversion factors or enter new ones for each client This setup allows you to select the default conversion factors that are applied in Sp
76. e 13 2 7 External printer auxiliary audio outputs An external printer may be connected to the the USB port It may be color or black amp white but it must be PCL3 PCL5 or PostScript compatible The external printer must first be selected in Setup See 6 Printing and Storing Results Auxiliary audio output jacks are not active with this version of software W the European Community if this device is connected to one or more other devices to make a system the CE mark on this device is only valid if the other devices in the system carry a CE mark in respect of the Medical Device Directive and if the supplier has stated that the requirements of the Medical Device Directive will be met for this particular combination FastFacts 2 7 External printer auxiliary audio outputs 3 General Operation 3 1 Section overview The RM500SL is operated by using the built in keypad a USB QWERTY keyboard not included or a USB computer mouse not included Any of these pointing devices can be used to select items from menus operate on screen buttons and to enter audiometric data In addition audiometric data printed in barcode form by the RM500SL the Verifit VF1 or some Grason Stadler products may be scanned into the RM500SL This section covers the following topics 3 2 Input device operation 3 3 Barcode data input 3 4 Keypad keys 3 5 Menus lists and buttons 3 6 Screen messages 3 7 Program memory removal and replacement 3 8
77. e cognitive abilities of the listener There is considerable individual variability in relating the SII to speech recognition especially amongst impaired listeners The following shows expected nominal recognition scores vs SII for normals on the Connected Speech Test Sherbecoe and Studebaker 2003 SII Score 10 1 15 8 20 20 25 45 30 60 35 74 40 84 45 90 50 94 55 96 60 98 70 99 80 90 FastFacts 17 10 SII calculation in Speechmap 0611 RM500SL User s Guide Version 2 8 Page 76 18 Speechmap Fitting Procedures 18 1 Section overview The procedures in this section assume a familiarity with 10 Real Ear Measurement Setup 11 REM Screen Setup and 17 Speechmap This section covers the following topics 18 2 Assessment data entry 18 7 Fitting to targets for mid level speech 18 3 Assessment data choices 18 8 Open fittings in Soeechmap 18 4 Assessment data choices 2 18 9 FM fitting and verification 18 6 Fitting to targets for loud sounds Related sections are 17 Soeechmap and 19 Soeechmap Technical Details FastFacts 18 1 Speechmap fitting procedures 18 2 Assessment data entry Threshold data and parameters may be entered by scanning a barcode on a previous RM500SL or Verifit printout or manually using a mouse the keypad or the numeric keypad on an external keyboard See 2 6 Mouse keyboard barcode scanner and 3 2 Input device operati
78. eechmap DSL to convert ABR nHL threshold to eHL threshold 1 Press lt Setup gt then highlight and lt PICK gt ABR eHL to nHL 2 Highlight and lt PICK gt DSL defined or User defined 3 For User defined enter conversion factors using a mouse the keypad or a keyboard See 18 2 Assessment data entry When using the barcode option both entered nHL data and the nHL to eHL conversion factors are printed as a single barcode See 3 3 Barcode data input FastFacts 10 6 ABR nHL to eHL setup 0611 RM500SL User s Guide Version 2 8 Page 53 10 7 Positioning the client Sound reflections from nearby surfaces including the operator can cause large measurement errors Room noise can increase test time cause errors and alter the operation of the hearing instrument being evaluated 1 Choose a quiet location and position the client and the real ear speaker at least 1 5 m 5 feet away from any hard surfaces 2 The speaker mounted in the lid of the test chamber is used for real ear measurements It is normally used with the lid in a near vertical position but the elevation may be changed by opening the lid past vertical 3 Position the client directly in front of and facing the front REM speaker at a distance of 18 to 36 45 to 90 cm from the center of the head The speaker and the head should be at approximately the same level FastFacts 10 7 Positioning the client 10 8 Positioning the probe tube 1 Use an o
79. eeeeeeecaaaeeeeeeeseeeecaaeeeeeeeeeeeeeeaaaes 56 12 REM Manual Control iceciececeniet case eee cteeeeen cates eects arse een stie es ee eee a 56 Tad e ene UE 56 12 2 Manual control measurements cee eeeeeceee cece eee eeeecaaaee eee eeeeteaaaaaeeeeeeeeteeeaaaaeeeeeeeseeeeaaaaes 57 12 3 Sound level meter using REM probe ssssssssseeiessssssssiirrssssstrrirnnttsssttrinnrnnssntrrnnnnnssstnnnnnnn 57 13 Sensory Loss Simulator aciic cee cae sence een ENNEN acento be teen NEEN ENKEN 58 13 1 Sensory loss simulator description 20 0 2 eee cece cette eee eee eeeceeeee eee e eee teeeaaaaeeeeeeeeeseeaaaeeeeeeeeseeeeaaaes 58 13 2 Sensory loss simulator operaiton eeeeeeecaaaeeeeeeeeeeeecaaeeeeeeeeeeeeeaaaes 58 14 OccluSlon Effect KT E 59 14 1 Occlussion effect measurement cee ccecetee eect eee eeecaaee eee eeeeeeccaaaaeeeeeeeeeeeecaaaeeeeeeeeeeeeeaaaes 59 15 RECD real ear to coupler dfterence ee EEN 60 UO Ne dee EE 60 15 25 RECDfactss 20 ncn cn veces Vas Vane Ve EE EE EE 60 15 3 REG couipler reSpONSe ievaino a aa iee 61 15 4 RECD real ear response eet eeeeccee eee etre ee eeaaaeeeeeeeeeteecaaaaeeeeeeeeeeeecaaeeeeeeeeeeeeenaaaes 62 15 5 e RRC SeS eien aaaea aaan aa a aaa anea saae a aaas 63 16 ee Ae Ce EE 64 16 1 Section Oovenlew 2 cece cette eect eee cncte nett eee t teen a eee e eter eta a aaa e eee e eee aaeee eee eee acdsee eeeeeeeneeaaaaes 64 16 2 INSEMON QalNuA S tege cane gedesasesenceamgeaestaeeneniceneseaaahudenoh Ee EN 64 SCHMIT 65 1
80. el gt FastFacts 3 4 Revert to previous state Keypad keys RM500SL User s Guide Version 2 8 Session Left Right Print Continue Help Page 17 0611 3 5 Menus lists and buttons Menu Real Ear Measurement Setup Box List Box Speechmap DSL_ oO Insertion gain Oj Manual control O Calibration Ol Audiometry Ear Transducer Headphone F Threshold Entered Average SO Cancel Continues Screen Buttons are identified by a circle within a raised block O and are located at the right hand end of a line of screen text A screen button highlighted using the keypad or a QWERTY keyboard is surrounded by a heavy line A screen button highlighted by the mouse pointer changes color from light to dark gray A highlighted screen button is operated by pressing the lt PICK gt round key on the keypad the numeric Enter key on a keyboard or by clicking the left mouse button This process also selects the highlighted item in a list box There are three different types of screen buttons When selected a Menu Button displays a menu a setup box or a test screen Insertion Gain O When selected a List Button displays a drop down list box BTE SO The current list item is shown in the window When selected a Toggle Button alternates between states REM 20 The current state is shown in the window FastFacts 3 5 Menus lists and buttons RM500SL User s Guide Version
81. en Setup In addition you will find a glossary references and more information in the electronic user s guide on the Audioscan software CD FastFacts 1 1 RM500SL Help topics 0611 RM500SL User s Guide Version 2 8 Page 6 1 2 New in this software release Software 2 8 introduces the following significant additions and changes 1 A Sensory Loss Simulator SLS which provides an accurate simulation of cochlear hearing loss for parents teachers and others to experience 2 DSL 5 which provides targets for adults allowances for ABR and bone conduction thresholds and speech targets for the stimulus level selected Note that targets do not appear until an REAR test has been started 3 Open Fitting protocol in Soeechmap which can be used to fit instruments with large vents or open ear molds 4 A new calibrated speech passage to augment the carrots passage 5 Screen images and test data may be saved to files on a USB memory stick 6 Support for PostScript printers including color laser printers 7 Realtime rms levels for broadband signals like speech and pink noise 8 The Scroll wheel on a mouse may be used to traverse long lists and Help 9 RECD measurements are now less sensitive to ambient noise 10 MPO tone bursts have been lengthened to 128ms for better correlation with loudness perception 11 Input Output screens now have a cursor readout Left click on any graph 12 New calibration amp equalization s
82. erage RECD Average BCT NIA Binaural No REDD Average tein Instrument _ Mode Format Seale dB Use Audiometry to change these REAR Stimulus Level SII Unaided avg 60 8000 Curve Hide Show oO Speechmap DSL 5 child Single view Estimated UCL RESR targets Result of REAR 2 Result of REAR 1 130 120 110 Fit to target range Speech valleys Long term average speech spectrum These buttons start a test 4000 FastFacts 17 8 Screen tour aided screen RM500SL User s Guide Version o E Q sl i fa 5 Aia Instrument _ Mode Presentation Single view Graph SPL 10 0 lololo Format Seale dB Audiometry Age 36 months Transducer Insert Foam UCL BECH 4 BCT Binaural lo Average Average NIA No REAR Stimulus Level we UO Speech std 1 Avg 70 we SlOl MPO 90 G il ag Unaided avg 60 Unaided SIH 19 8000 Curve Hide Show ce Sil 77 NA 2 8 Page 74 17 9 REM or S REM mode The Speechmap environment provides two hearing instrument verification options REM real ear measurement and S REM simulated REM In REM mode the stimulus is controlled by the REM reference microphone below the ear and SPL in the ear canal is measured by the probe microphone In S REM mode levels measured in the 2cc coupler are converted to estimated ear canal leve
83. evel of a speech passage in 1 3 octave bands averaged over the entire passage Loop System an assistive listening device that uses magnetic induction to carry a signal from a microphone amplifier to a wire loop The signal is picked up from the loop by a hearing aid set to the telecoil position or by a receiver with built in telecoil volume control and earpiece Loops are either worn around an individual s neck or can encircle a room such as a classroom providing an excellent signal to noise ratio MAF minimum audible field SPL of a tone at the threshold of audibility measured in a free sound field for a subject listening with both ears and facing the sound source The SPL is measured with the subject removed from the field at the midpoint of an imaginary line joining the centers of the ear canal openings 0611 RM500SL User s Guide Version 2 8 Page 95 MAP minimal audible pressure SPL of a tone measured or inferred at the tympanic membrane at the threshold of audibility MPO Maximum Power Output the maximum SPL that a hearing aid can deliver in response to a steady narrow band input The stimulus may be pulsed a tone burst to avoid discomfort and to obtain a worst case maximum output Modulation the process of varying a characteristic of one signal with another NAL National Acoustic Laboratories Australia NCA National Centre for Audiology Canada Nonlinear Region that portion of the input output function which is
84. f Dual noise 70 Dual noise 70 B 1004 Front signal 7 90 5 3 0 80 4 a oll 704 Curve Hide Show O EA SC Sat SE Adaptive Directional so l gt instrument 20 seconds Si after signal applied LBE DE eras DN a EE WEEN EE a Femme VE a Wm SO ees 250 500 1000 2000 4000 8000 Figure 6 A real ear directional test on an adaptive instrument with active compression and noise reduction Directional test not available in RM500SL 3 2 Real speech signal analysis One of the most used measures of a speech signal is the long term average speech spectrum LTASS Thisis a 1 3 octave spectrum averaged over a sufficiently long portion of the speech material to provide a stable curve In practice a 10 second average meets this requirement and for this reason all Soeechmap passages are at least 10 seconds long The dynamic nature of speech is often characterized by the distribution of short term levels in each 1 3 octave band These levels are determined by calculating a spectrum for each of a series of short time periods within the passage Historically time periods of 120 125 or 128 ms have been used The Verifit and RM500SL use a 128 ms time period resulting in 100 levels or samples in each 1 3 octave band for a 12 8 second passage The level in each band that is exceeded by 1 of the samples called L1 the 17 or 99 percentile has historically been referred to as the speech peak for t
85. f output caused by the output circuitry and transducer reaching their maximum capability SPA Special Purpose Average the average of values in dB at three third octave frequencies separated by 2 3 of an octave ANSI S3 22 See also HFA Spectrum the BSPL as a function of frequency for a broad band signal SII Speech Intelligibility Index a quantity calculated from measures of speech noise and hearing threshold that is highly correlated with the intelligibility of speech ANSI S3 5 Speech Region a statistical range of short term spectra present in a speech passage The short term spectra are typically 120 130 millisecond averages in 1 3 octaves The statistical range is typically from the 70 to the 99 percentile SPL Sound Pressure Level rms sound pressure relative to 20 uPa expressed in decibels SPL 20log rms sound pressure 20uPa SPLITS coupler SPL for an inductive telephone simulator SPL developed in a 2cc coupler by a hearing aid with the gain control at the RTS when the input is the magnetic field generated by a TMFS ANSI 3 22 TMFS Telephone magnetic field simulator a device for producing a magnetic field of consistent level and geometric shape when driven by a specified current ANSI 3 22 THD Total Harmonic Distortion the rms value of all harmonic components as a percentage of the rms value of the fundamental If less than 20 the rms value of the total signal may be used instead of the fundamenta
86. f the barcode scanner fails to read known good barcodes try the following 1 Unplug the scanner from the RM500SL then reconnect it If the problem persists 2 Print this page on an external printer see 2 7 External printer auxiliary audio outputs or from the electronic user s guide on the RM500SL software CD see 1 3 Electronic user s quide 3 Scan these two barcodes starting with the top one This will reset the scanner to its default settings FastFacts 20 12 Barcode scanner malfunction RM500SL User s Guide Version 2 8 Page 92 21 Technical Specifications Storage amp Transportation Temperature oo eee eee eeeeeeeeeeeeeeeaeeee 20 C to 60 C Relative humidity non copndensing 5 to 95 Atmospheric Dressure cece eeeeeeeeeeeeeee 500 1060 hPa General Overall dimensions 15 5 x12 75 x4 25 UE Il 15lb Display type fluorescent backlit active color RI EC 12 1 diagonal RESOMUTION 2 oeg0eeerek dk 800x600 SVGA Printer type thermal line printer Printer resolution 200 dots per inch Papar Width REG 3 80mm Power amplIIEtg issiran SSES 2 Stimulus Channel 2 Measurement Channels cccccccccssecessseeecsseeeesseesesseeeessaeeess 1 Connectors seee 1 USB 1 Ethernet RJ45 1 RS232 serial 9D 2 auxiliary audio outputs 1 4 mono 1 RECD transducer 3 5mm st 1 test chamber ref mic 3 5mm st 1 coupler microphone 3 5mm st 1 battery
87. foam tip to fully expand in the ear 7 Press lt Continue gt to generate the real ear response curve pink and the RECD curve cyan If the RECD curve is negative and unstable in the low frequencies check the seal of the foam tip Increase the tip size and or apply a lubricant to the foam tip to improve the seal If the RECD curve deviates more than 10 dB from the average in the 4 6 kHz region check for proper probe placement and possible blockage of the tube by the foam tip or cerumen 8 When these curves are stable press lt Continue gt to save them For comparison purposes an age related average RECD is shown as a dotted curve on the screen If you have accessed RECD from the REM tests list you may highlight and lt PICK gt the Age box to change the age for this reference curve FastFacts 15 4 RECD real ear response RM500SL User s Guide Version 2 8 Page 62 0611 15 5 RECD results The RECD measurement screen shows the response of the RECD transducer in the real ear pink and in the 2cc coupler green The difference between these curves is the RECD cyan An age appropriate average RECD is shown for reference dotted A negative RECD below about 1 kHz may indicate a poor seal between the foam tip and the ear canal A negative RECD above about 3 kHz may indicate the foam tip is blocking the probe tube See 15 2 RECD facts 15 3 RECD coupler response 15 4 RECD real ear response RECD 90 80 70
88. for adults and children If Headphone is selected as the transducer type adult average values will be used to transform dB HL audiometry to dB SPL ABR nHL to eHL Normalized HL to estimated HL conversion factors Permitted only if Transducer ABR nHL Select from Default Enter If Enter is selected an entry screen will be provided after threshold data have been entered Otherwise default factors will be used These may be set to DSL values or to values that you have entered in Setup Note that in some facilities nHL is defined in such a way that it is effectively eHL in these cases ABR eHL should be selected and no conversion factors will be applied See 10 6 ABR nHL to eHL setup and 18 3 Assessment data choices 1 FastFacts 18 4 Assessment data choices 2 RM500SL User s Guide Version 2 8 Page 79 0611 18 5 Fitting to targets for soft speech See 17 9 REM or S REM mode 17 6 Using Speechmap and 18 2 Assessment data entry for setup and audiometric data entry 1 Select Audiometry to choose the target method and enter audiometric data 2 Select REAR 1 and set stimulus to Speech std 1 or Speech std 2 and level to 50 Elongated symbols show the target range for 50 dB speech LTASS 3 Adjust frequency shaping and gain for soft sounds so that the middle curve the LTASS falls within the target range especially between 500 4000 Hz Press lt Continue gt to run the complete passage Repeat as nece
89. gements RM500SL User s Guide Version 2 8 Page 8 0611 1 5 Notices for the European Community Authorised Audioscan representative within the European Community PC Werth Ltd Audiology House 45 Nightingale Lane London SW12 8SP UK Phone 44 0 20 8772 2700 www pcwerth co uk Electromagnetic Compatability EMC Medical electrical equipment needs special precautions regarding EMC and needs to be installed and put into service according to the following information v The RM500SL should not be used adjacent to or stacked on other equipment If this is necessary its operation should be verified as normal in this configuration Portable and mobile RF communications equipment can affect medical electrical equipment and may affect the performance of the RM500SL The RM500SL has not been tested for immunity to electromagnetic disturbances Performance degradation due to such disturbances including electrostatic discharge is considered normal and acceptable FastFacts 1 5 Notices for the European Community 1 6 Declaration of EMC compliance for the European Community The compliances listed in the following table are met with the Audioscan SL 100 RECD transducer connected The use of other accessories may result in increased emissions Guidance and manufacturer s declaration electromagnetic emissions The RM500SL is intended for use in the electromagnetic environment specified below The user of the RM500SL should assure
90. ghlight and lt PICK gt Date amp Time on the Setup poster 2 To change the date highlight and lt PICK gt the month window to display a drop down list of months 3 Highlight and lt PICK gt the desired month on the list 4 Repeat the previous step to change the date year and time in the appropriate windows 5 When the new date and time information has been set press lt Continue gt to exit FastFacts 4 2 Date and time setup 0611 RM500SL User s Guide Version 2 8 Page 20 4 3 Display settings This feature sets the screen saver timing and the background color used on the graphic test displays The screen saver blanks the screen after 60 90 or 120 minutes of inactivity to prolong the life of the display To change display settings 1 Press lt Setup gt then highlight and lt PICK gt Display 2 To change the screen saver timing highlight and lt PICK gt the current setting 3 Highlight and lt PICK gt the desired screen saver timing from the drop down list 4 To change the background color of the graphic display on the various test screens highlight and lt PICK gt Color to toggle between black and white 5 Press lt Continue gt to exit setup FastFacts 4 3 Display settings 4 4 Saving test setup This feature lets you retain the last used stimulus type and level for most tests when the power is turned off It also lets you retain the last used target method and transducer type in Soeechmap
91. ght and lt PICK gt Start test test setup instructions will be displayed 3 Refer to 7 11 Coupling the hearing instrument 7 12 Positioning the hearing instrument and 2 5 Battery pill use and care to prepare the instrument for testing 4 Turn the instrument ON 5 Set the gain control manual or programmable to maximum with all other controls set to provide the widest frequency response greatest gain and highest maximum output AGC controls and or programmable parameters should be set to minimize AGC action AGC off or threshold high compression ratio close to 1 6 Press lt Continue gt to run the test or press lt Cancel gt to abort the test Note that if required the RM500SL will pause during the test to request that the gain control be adjusted to the Reference Test Setting RTS If necessary open the HIT chamber and without moving the hearing instrument adjust the gain control until the large vertical arrow on the screen prompt disappears Press lt Continue gt to resume the test During the AGC test the RM500SL will pause to request that AGC controls or programmable parameters be set for maximum AGC effect If the manufacturer does not provide settings to produce maximum AGC effect use settings that result in the highest gain for soft sounds and the lowest gain for loud sounds This will typically result in the lowest compression threshold a flat I O curve and the longest attack release times These are not typi
92. gt then highlight amp lt PICK gt Speechmap from the REM tests list To change screen setup see 11 REM Screen Setup and 17 9 REM or S REM mode To set up hearing instrument type highlight A lt PICK gt Instrument then highlight amp lt PICK gt BTE ITE ITC CIC Open Body CROS or FM This changes microphone location effects and the RECD used in S REM and 2cc targets and the reference microphone used for FM and CROS To enter audiometric data see 18 2 Assessment data entry To run a test highlight and lt PICK gt one of the 4 REAR buttons Then highlight and lt PICK gt Stimulus to select the stimulus type Highlight and lt PICK gt Level to select stimulus level Press lt Continue gt to run the test and display the data See 17 7 Screen tour amp 18 Soeechmap Fitting Procedures FastFacts 17 6 Using Speechmap 0611 RM500SL User s Guide Version 2 8 Page 73 0611 17 7 Screen tour unaided screen Speechmap 140 Max TM SPL 130 Change this in Setup 130 120 110 Impaired threshold l Long term average speech spectrum LTASS 0 S LTASS 12 dB PADRE Unamplified60 dB gt use Hide Show Normal a threshold MAP 250 4000 FastFacts 17 7 Screen tour unaided screen 17 8 Screen tour aided screen oe H Speech region ee Fa RE LEE on audioscan BTE 70 REM SO Graph FO SPL So Age Adult Transducer Headphone UCL Av
93. hat band The curve for these 1 levels is approximately 12 dB above the LTASS The level in each band that is exceeded by 70 of the samples called L70 the 70 or 30 percentile has historically been called the valley of speech for that band The curve for these 70 levels is approximately 18 dB below the LTASS The region between these two curves is often called the speech region speech envelope or speech banana The speech envelope when derived in this way has significance in terms of both speech detection and speech understanding Generally speech will be detectable if the 1 level is at or near threshold The Speech Intelligibility Index SII is maximized when the entire speech envelope idealized as a 30 dB range is above masked threshold This will not be an SII of 100 or 1 because of loudness distortion factors but higher SII values will not produce significantly higher scores on most test material The speech reception threshold SRT is attained when the LTASS is at threshold approximately depending on test material and the individual These scenarios are shown in Figures 7 9 which follow It should be noted that analysis methods which use shorter time periods produce higher peak levels and significantly different soeech envelopes In order to produce results that can be directly compared to measures of threshold and UCL the analysis time period needs to approximate the integration time of the ear Although this varies
94. he hearing aid in place and turned on ANSI S3 46 RECD Real Ear to Coupler Difference difference in dB as a function of frequency between the SPL or BSPL produced by an insert transducer at the eardrum and in a 2cc coupler HA 1 or HA 2 coupler should be specified REDD Real Ear to Dial Difference difference in dB as a function of frequency between the SPL or BSPL measured at the eardrum and the audiometer dial setting that produced it It is specific to the client headphone and audiometer used to generate it REIG Real Ear Insertion Gain difference in dB as a function of frequency between the REAG and the REUG taken with the same measurement point and the same sound field conditions REIG REAG REUG ANSI S3 46 REOG Real Ear Occluded Gain difference in dB as a function of frequency between the SPL or BSPL at a specified measurement point in the ear canal and the SPL or BSPL at the field reference point for a specified sound field with the hearing aid in place and turned off ANSI S3 46 REOR Real Ear Occluded Response SPL or BSPL as a function of frequency at a specified measurement point in the ear canal for a specified sound field with the hearing aid in place and turned off ANSI S3 46 The REOR is used to evaluate the seal of an earmold It is not related to the required gain of a hearing aid 0611 RM500SL User s Guide Version 2 8 Page 96 REUG Real Ear Unaided Gain difference in dB as a fun
95. hone 0611 RM500SL User s Guide Version 2 8 Page 34 0611 7 10 Calibration check for coupler microphone Accuracy of HIT measurements depends on the calibration of the coupler microphone This should be checked regularly using a microphone calibrator with an adapter ring The RE780 1 1 8 and RE781 1 rings are designed for Quest CA22 and QC 10 20 respectively To verify the coupler microphone calibration 1 Calibrate the HIT reference microphone See 7 9 Calibration of HIT reference microphone 2 Screw the appropriate calibrator ring onto the coupler microphone 3 Insert the coupler microphone with the attached calibrator ring into the calibrator opening 4 Turn the calibrator on and adjust it to present one of the available frequencies and levels e g 94 dB SPL at 1000 Hz 5 Press lt Tests gt then highlight and lt PICK gt HIT Manual control 6 Highlight and lt PICK gt the Level window then highlight and lt PICK gt 0 from the drop down list 7 Highlight then lt PICK gt the Frequency window then highlight and lt PICK gt the frequency of the calibrator e g 1000 Hz from the drop down list 8 Highlight then lt PICK gt the Filter window then highlight and lt PICK gt 1 12th octave from the drop down list 9 Highlight then lt PICK gt Start test which changes to Stop test 10 Check that the Coupler microphone level is within 1 dB of the calibrator level setting the c
96. hone and its associated tubing does not have a flat frequency response The REM calibration process compares this response with the flat factory calibrated response of the REM reference microphone and compensates all subsequent probe tube measurements for this difference It may be performed as often as desired but will be invalidated at 1 am the following day or at 1 am the following Monday depending on the choice of Daily or Weekly calibration interval After the calibration has expired you will be prompted to calibrate whenever you attempt a test that uses the REM microphones It is suggested that a copy of the calibration curves for the probe modules when new be posted near the RM500SL for comparison with daily or weekly curves If there is a drift in calibration with time the module may need replacement See 10 4 Calibration check for probe module Calibration should be repeated if probe modules are switched or if a probe tube with different dimensions is installed FastFacts 10 2 REM calibration facts 0611 RM500SL User s Guide Version 2 8 Page 50 0611 10 3 Calibration of REM probe microphone Ensure the probe microphone assembly to be calibrated is plugged into the appropriate jack See 2 3 Microphone connection and 10 2 REM calibration facts 1 Open the test chamber and elevate the speaker to its vertical position PROBE TUBE 2 Press lt Tests gt then highlight amp lt PICK gt Calibration from the REM column
97. ignals improve accuracy and noise rejection 13 Speech level now goes down to 50dB SPL 14 Hatching legends and curve numbers are shown on printouts for better identification on black and white printouts Please consult the relevant section of this User s Guide or Help for more details FastFacts 1 2 New in this software release 1 3 Electronic user s guide A printable user s guide is on the Audioscan CD ROM supplied with a new instrument or mailed as a software update A pdf file viewer such as Acrobat Reader 5 0 or higher or Foxit Reader is required to view the User s Guide Foxit Reader is supplied on the CD ROM 1 Insert the CD ROM into the CD drive on your computer 2 Select My Computer then the CD drive and the User s Guide folder 3 To install Foxit Reader copy FoxitReader exe to an appropriate location on your PC To run FoxitReader exe double click it 4 To view the User s Guide double click the RM500SLUsersGuide pdf file The User s Guide may also be downloaded from www audioscan com FastFacts 1 3 Electronic users guide 0611 RM500SL User s Guide Version 2 8 Page 7 0611 1 4 Warranty Trademarks Acknowledgements The Audioscan RM500SL is manufactured by Etymonic Design Inc 41 Byron Ave Dorchester Ontario Canada NOL 1GO0 Phone 800 265 2093 USA only 519 268 3313 Fax 519 268 3256 www audioscan com Email info audioscan com or service audioscan com Warranty The RM500SL i
98. imes are measured To change the averaging frequencies 1 Press lt Setup gt then highlight and lt PICK gt Frequencies 2 Highlight and lt PICK gt the HFA SPA frequencies box to generate a drop down list box of alternate test frequencies 3 Highlight the desired HFA SPA test frequencies and press lt PICK gt to select To change the frequencies for attack and release time measurements In the list of available frequencies highlight and lt PICK gt the frequencies to be used to measure attack and release time Press lt Continue gt to exit FastFacts 7 7 ANSI test frequencies RM500SL User s Guide Version 2 8 Page 32 7 8 HIT calibration facts 0611 HIT microphone calibration establishes a correction curve for the uncalibrated HIT reference microphone by comparison with the factory calibrated coupler microphone It may be performed as often as desired but will be invalidated at 1 am the following day or at 1 am the following Monday depending on the choice of Daily or Weekly calibration interval After the calibration has expired you will be prompted to calibrate whenever you attempt a test that uses the HIT microphones Note that there are two styles of HIT reference microphones The newer style is larger but responds beyond 16 kHz and has a lower noise floor The two have different correction curves as shown below but will produce the same test results once calibrated Your calibration curve should be similar
99. ion the Real Ear Measurement REM system must be properly set up and calibrated the client must be properly positioned and the probe tube must be properly positioned in the ear canal Note that the REM speaker is in the lid of the test chamber which must be open to a near vertical position for all real ear measurements Real Ear Unaided Response REUR SPL or band SPL in the open unaided ear canal for a given stimulus Real Ear Unaided Gain REUG Difference in dB between the REUR and the stimulus SPL or stimulus band SPL Real Ear Aided Response REAR SPL or band SPL in the ear canal for a given stimulus with a working hearing aid in place Real Ear Aided Gain REAG Difference in dB between the REAR and the stimulus SPL or stimulus band SPL Real Ear Saturation Response RESR The REAR obtained using a narrow band signal at a level high enough to saturate the hearing aid usually 85 90 dB SPL Real Ear to Coupler Difference RECD Difference in dB between the real ear SPL and the 2cc coupler SPL produced by the same transducer driven by the same signal This section covers the following topics 10 2 REM calibration facts 10 6 ABR nHL to eHL setup 10 3 Calibration of REM probe microphone 10 7 Positioning the client 10 4 Calibration check for probe module 10 8 Positioning the probe tube 10 5 Max TM SPL setup FastFacts 10 1 Real ear measurement setup 10 2 REM calibration facts The probe microp
100. ion 2 8 Page 77 0611 18 3 Assessment data choices 1 The following audiometric assessment parameters can be specified in the Speechmap Audiometry setup box Defaults are the last used choices if test setup memory has been turned on See 4 4 Saving test setup 1 Target Select fitting targets from DSL adult DSL child NAL NL1 None DSL 5 and NAL NL1 differ in the derivation of amplified LTASS and RESR targets Selecting None eliminates the LTASS targets UCL estimates are from DSL 2 Age This is permitted for DSL child target only Select client s age in months from 1 months to 60 months or years from 6 years to 10 years For children older than 10 yrs previously fit using DSL choose Adult 3 Transducer Type of audiogram Select from Headphone Insert Foam Insert Mold Soundfield ABR eHL ABR nHL If Insert Foam or Mold is selected the appropriate RECD will be used to convert entered HL values to SPL values If Soundfield is selected appropriate real ear unaided gain REUG values 45 degrees azimuth will be used to convert HL values to SPL values If ABR eHL is selected entered thresholds will be treated as behavioral pure tone thresholds If ABR nHL is selected nHL to eHL conversion factors may be selected from Default Enter In either case an insert earphone is assumed for sound delivery and the appropriate RECD will be applied Note that in some facilities nHL is defined in such a way that
101. ithout moving the hearing instrument press lt Continue gt to store the Average HFA or SPA SPLITS value and run the SPLITS curve 9 If an RTG has been previously obtained the STS or RSETS will be shown FastFacts 8 9 ANSI telephone simulator TMFS test RM500SL User s Guide Version 2 8 Page 44 0611 8 10 Telecoil test results ANSI 3 22 2003 Telecoil 250 500 audioscan Format Graph SO Scale dBSPL_ Ref Test Gain 36 dB Simulated telephone performance Start TMFS test OH Telephone simulator Average SPLITS 90 5 dB RSETS 55 dB HFAISPA 1000 1600 2500 Hz A A 1000 2000 4000 8000 See 8 8 ANSI telecoil terminology for explanation of abbreviations Note that the 2003 standard requires that the telecoil test be performed with the AGC set for minimum effect See 8 3 ANSI S3 22 2003 facts The 1996 standard requires the manufacturer to specify the AGC settings used for the telecoil test FastFacts 8 10 Telecoil test results RM500SL User s Guide Version 2 8 Page 45 9 Other Hearing Instrument Tests 9 1 Section overview In addition to the tests of ANSI S3 22 the RM500SL provides the following Distortion Harmonic distortion at 279 or 3 harmonics and 2 plus 3 with input levels varying from 60 90 dB SPL Multicurve 1 4 curves of coupler SPL or coupler gain for swept tones or pink noise in 1 12 octaves at selected input SPL of 0 or 40 to 90 dB in
102. l For most hearing aids the inclusion of harmonics above the third will not significantly alter the THD ANSI S3 22 Transducer a device which transforms energy from one form to another For example a microphone or earphone UCL Uncomfortable Listening Level the level for a specified stimulus that is judged to be definitely uncomfortable 0611 RM500SL User s Guide Version 2 8 Page 97 VGA video graphics adapter VC Volume Control a user operated gain control Warble Tone a frequency modulated sine wave The modulating signal is often a low frequency triangle wave 1 Valente M Strategies for Selecting and Verifying Hearing Aid Fittings New York Thieme Medical Publishers Inc 1994 ANSI 3 5 Methods for Calculation of the Speech Intelligibility Index 1997 ANSI S3 6 Specification for Audiometers 1996 ANSI S3 22 Specification of Hearing Aid Characteristics revised 2003 ANSI 3 46 Methods of Measurement of Real Ear Performance Characteristics of Hearing Aids 1997 23 References American National Standards Institute 1997 American National Standard Methods of Measurement of Real Ear Performance Characteristics of Hearing Aids ANSI S3 46 1997 New York American National Standards Institute American National Standards Institute 1996 American National Standard Specification of Hearing Aid Characteristics ANSI S3 22 1996 New York American National Standards Institute Bagatto M Moodie S T Scollie
103. l control procedure Manual control displays the reference microphone SPL the coupler microphone SPL their difference in dB gain and coupler microphone signal distortion at any selected 1 12 octave frequency and at a selected input level from 40 to 90 dB in 5 dB steps and at 0 dB off 1 Press lt Tests gt then highlight and lt PICK gt Manual control 2 Highlight and lt PICK gt the Level window then highlight and lt PICK gt the desired stimulus level from the drop down list 3 Highlight and lt PICK gt the Frequency window then highlight and lt PICK gt the desired frequency from the drop down list Distortion measurement data is available only from 200 4000 Hz 4 Highlight and lt PICK gt Start test to start the test Start test changes to Stop Test To stop the measurement highlight and lt PICK gt Stop test You may change Level and Frequency without stopping the test FastFacts 9 7 Manual control procedure Level 70 Frequency 560 ZO d SO He Start test 10 Distortion 9 0 ha L L N halal S Pel o 10 20 30 40 50 60 70 80 90 100 Coupler microphone 97 5 dB a aS Gain ee is GG GL 0 10 20 30 40 50 60 70 80 90 100110120130 Reference microphone 70 0 dB Cen EES ES cL JL Ur ea 0 10 20 30 40 50 60 70 80 90 1001101201930 Gain 27 5 dB T eT ep A Wp ALAE ee IECH o 10 20 30 40 50 60 70 80 90 100 9 8 Sound level meter using manual control When set f
104. leak between the hearing instrument under test and the coupler it is connected to For BTE type instruments check the integrity of the 13 tubing at the end of the coupler where it joins with the ear hook Look for cracks ITE type instruments need to have a good seal between the hearing instrument and the coupler In addition all vents need to be closed from the faceplate side of the hearing instrument Ambient room noise may be leaking into the test chamber Air conditioners computer fans and similar noisemakers can yield artificially high noise figures Check the sealing of the test chamber Try turning off suspected noise sources to identify the cause Vibration may be coupled into the test chamber from other equipment on the same table or wooden floor Computers fans and air conditioners may be the source of the vibration Try turning off suspected sources to identify the cause Relocate the source or the RM500SL or mount it on a foam pad FastFacts 20 3 HIT high distortion or noise 20 4 HIT curves inconsistent The HIT curves keep changing from test to test v The battery may be close to end of life or starved for air zinc air cells because of a tight seal on the battery compartment Try a fresh battery or using the optional RM500SL battery pill v The HIT reference microphone the white one in the test chamber is incorrectly positioned In order to control sound pressure levels precisely at the microphone inlet of the heari
105. lick Enter numeric data Select point on chart Numeric keypad Left click ona point on chart Enter text Not possible Any key Not possible Proceed from current state lt Continue gt Enter Click Continue Revert to previous state lt Cancel gt Esc Click Cancel Also see 2 6 Mouse keyboard barcode scanner and 3 3 Barcode data input FastFacts 3 2 Input device operation RM500SL User s Guide Version 2 8 Page 15 0611 3 3 Barcode data input In Speechmap and Insertion gain tests audiometric data in barcode form ona RM500SL or Verifit printout may be entered by scanning the appropriate barcode In Speechmap threshold UCL RECD transducer age and ABR nHL to eHL conversion factors are encoded In Insertion gain threshold and transducer type are encoded The type of data and the ear left right is shown below the barcode Only data for the displayed ear are imported Barcodes may be scanned in any order and it does not matter if the barcode is upside down ort 1 Select Speechmap or Insertion gain from the Tests menu 2 Hold the printout so that the barcode to be scanned is flat With the scanner 6 8 from the barcode press the trigger on the scanner and center the illuminated red line along the length of the barcode 3 When the scan is successful the scanner will Barcode Entry beep the red line will extinguish and a B
106. lowing shows expected nominal recognition scores vs SII for normals on the Connected Speech Test Sherbecoe and Studebaker 2003 SII Score 10 1 15 8 20 20 25 45 30 60 35 74 40 84 45 90 50 94 55 96 60 98 70 99 80 90 FastFacts 16 7 SII calculation in Insertion gain RM500SL User s Guide Version 2 8 Page 69 17 0611 Speechmap 17 1 Section overview Speechmap presents hearing threshold UCL and amplified speech spectra as SPL in the ear canal The fitting goal is to make amplified speech audible and comfortable while avoiding discomfort for loud sounds Spoeechmap is normally used in SPL and this guide describes only this usage See 11 4 SPL or HL scale This section covers the following topics 17 2 Speechmap facts 17 7 Screen tour unaided screen 17 3 DSL 5 0 in Soeechmap 17 8 Screen tour aided screen 17 4 DSL 5 0 changes 17 9 REM or S REM mode 17 5 NAL NL1 in Speechmap 17 10 SII calculation in Soeechmap 17 6 Using Speechmap Related sections are 18 Soeechmap Fitting Procedures and 19 Speechmap Technical Details FastFacts 17 1 Speechmap 17 2 Speechmap facts Speechmap is a trademarked hearing instrument fitting environment introduced by Audioscan in 1992 It presents hearing threshold UCL and amplified speech spectra as SPL in the ear canal The fitting goal is to make amplified speech audible and comfortable while avoidi
107. ls using the RECD values age appropriate average entered or measured In addition the stimulus delivered to the hearing instrument microphone is modified to include average microphone location effects for the hearing instrument type indicated The screen display for both modes is the same showing SPL measured or simulated in the ear canal For REM mode review 10 Real Ear Measurement Setup For S REM mode review 7 9 Calibration of HIT reference microphone 7 11 Coupling the hearing instrument 7 12 Positioning the hearing instrument It is suggested that hearing instruments be preset in S REM mode with fine tuning done in REM mode v Highlight and lt PICK gt Mode to toggle between REM and S REM Note that REM mode should be used for vented or open fittings Vent effects depend on the vent the ear and the hearing aid settings FastFacts 17 9 REM or S REM mode 0611 RM500SL User s Guide Version 2 8 Page 75 17 10SIl calculation in Speechmap The RM500SL calculates a Speech Intelligibility Index SII value in for unaided speech at 70 dB SPL and for each aided test The calculations use the 1 3 octave band method of ANSI S3 5 1997 without the 160 Hz band and without masking effects Level distortion effects are included but no hearing loss desensitization is applied An idealized speech region of LTASS 15 dB is used The speech recognition associated with a given SII is a function of the test material and th
108. m this 250 500 1000 2000 4000 8000 For small children the peak may shift to the right and become sharper Drainage tubes and perforated ear drums will cause large differences usually around 1 kHz FastFacts 16 5 REUR measurement procedure 0611 RM500SL User s Guide Version 2 8 Page 67 16 6 REAR measurement procedure 1 Press lt Tests gt then highlight and lt PICK gt Insertion gain from the REM list 2 Referring to 10 Real Ear Measurement Setup and 11 REM Screen Setup prepare the system position the patient and insert the probe tube For tight fitting hearing aids or earmolds the probe tube may be inserted through a vent 3 Without disturbing the probe tube insert the hearing instrument or earmold 4 Referring to 16 4 Audiometric data entry enter threshold data 5 Highlight and lt PICK gt button 1 2 or 3 in the REAR REIG column This will present a signal from the REM speaker and display the REAR Setup box 6 Highlight and lt PICK gt Stimulus then highlight and lt PICK gt Pink noise or Swept Use pink noise when using the NAL NL41 fitting formula Use Swept when testing maximum output capabilities 7 Highlight and lt PICK gt Level then highlight and lt PICK gt a stimulus level from the list box Use the level shown on the target REIG curves If no level is shown use the lowest level required to overcome background noise 8 Adjust the hearing instrument so that the REIG curve SPL
109. me adult average RECD and REUG as used in DSL The RESR targets are from Hearing Aids Dillon Thieme Publishing 2001 p274 An insertion gain version is available by selecting Insertion gain from the REM tests menu The pink noise stimulus should be used 0611 FastFacts 17 5 NAL NL1 in Speechmap RM500SL User s Guide Version 2 8 Page 72 17 6 Using Speechmap The Speechmap fitting environment provides a number of distinctly different stimuli Speech and noise are analyzed in 1 3 octave bands and except for pink noise data are presented as 3 curves The top curve is the level exceeded 1 of the time speech peaks the lower curve is the level exceeded 70 of the time speech valleys and the middle curve is the average Starting a test causes the signal to be presented continuously the speech signals run in a loop and the curves are updated frequently to show any changes you make to the hearing instrument Pressing lt Continue gt restarts the speech passage and the curves are then calculated for the entire passage producing an accurate display of the speech region and LTASS and an accurate SII calculation When using live speech a lt Freeze curve gt button captures short term speech features See 17 10 SII calculation in Soeechmap and 19 Speechmap Technical Details Before starting please review 10 Real Ear Measurement Setup 17 2 Speechmap facts 17 9 REM or S REM mode To access Speechmap press lt Tests
110. moothing When calculating overall rms from these data the SPL at 225 Hz and subsequent 1 3 octave increments should be used Analysis of broad band signals in all Hearing Instrument Tests is in 1 12 octave bands and the band SPL is displayed at 1 12 octave frequencies 3 1 Pink noise signal analysis All band levels are calculated with an averaging time of 128 ms For a linear hearing aid a pink noise stimulus will result in a response curve that has the same shape as one obtained using a swept pure tone However it must be remembered that while a swept tone has the same band SPL as overall SPL the band SPL for a noise signal is significantly lower than the overall SPL Consequently for a linear aid output curves obtained using 1 12 octave analysis will be about 18 dB lower than the output curves obtained using a swept tone at the same overall SPL As long as the hearing aid is linear the gain obtained will be the same for both signals Figure 5 shows output A and gain B for a linear hearing aid obtained using a swept tone 1 and pink noise 2 with a 60 dB overall SPL 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 4 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com Analysis Bandwidth Used by Various Analyzers To Analyze Complex Signals 35 Verifit RM500SL Speechmap 1 24th Octave Analyzers A 30 The Normal Ear Critical Bands A gt K 100 H
111. must first enable networking See 5 Networking You must also share a folder in the PC root directory e g c MyData and ensure that Change permissions are enabled 1 Press lt Setup gt then highlight and lt PICK gt Printing 2 Highlight and lt PICK gt Print to file 3 Highlight and lt PICK gt the file type Bitmap omp or Internet GIF gif 4 Highlight and lt PICK gt Full screen Main window full screen without the message line or Active window foreground image only 5 Connect a computer keyboard to the USB port and fill in Computer Share name Username and Password not needed for Windows 95 98 Highlight and lt PICK gt each box to open it for data entry and again to close it or use the Enter key on the keyboard s numeric keypad 6 Highlight and lt PICK gt Test connection and wait for a successful report 7 To input a file name each time you lt Print gt highlight and lt PICK gt Page setup then highlight amp lt PICK gt Ask Do not use space or tab in the file name Network file File type Bitmap bmp ZO Print frame Main window OU Network name of your PC Computer Alice Deeg folder on your PC Share name MyData O Case sensitive May not TEE Alice O contain space or tab Password EE een user name and password if required FastFacts 6 7 Printing to a network file 6 8 Data storage to a network file All measurement data curves
112. nd 81 18 7 Fitting to targets for mid level speech 82 18 8 Open fittings in Gpeechmap cc ceeeceeee eee eeeccnee eee e eee eeeeaaeee sees ee eecaaaeeeeeeeeeeeecdaaaeeeeeeeseneeaaaes 82 18 9 FM fitting and verflcatlon eect eeeceeee eee etre ee eea a aes sees eee teeaaaaeeeeeeeeeteecaaaeeeeeeeeeeeeeaaaes 83 19 Speechmap Technical Details a egeigguereserzseege egegeetSeeedEEeeEESNEE NES NEES 84 Ce dee E 84 19 2 Mia Ee KE 84 19 37 Stimulus Eelere EA 85 19 4 Microphone location effects AANEREN 86 19 5 Speech signal analysis 87 20 MEGUDIESMOONING WEE 88 HE Ree 88 20 2 Self test failures wives ees 88 20 3 HIT high distortion or nolse eee e eee eeeecaaee eset ee eeecaaaeeeeeeeeeeeceaaaaeeeeeeeeeseessaeeeeeees 89 20 4 HIT curves Inconslsient eee ee eteeee aa aee seen eet aaaaaeeeeeeetteaaaaaeeeeeeeseeeneaaaaeeeeees 89 20 5 HIT curves differ from Specifications cccccccceccceccceeeeeeeeeeeeeeecaeeeeeeeeeeeceaaaeeeeeeeeteeesnsaeeeeeees 90 20 6 HIT speaker oer Et ee eA 90 20 7 No HIT reference mic deteched AAA 90 20 8 Invalid HIT calbratton eee eeeeecaaaeeeeeeeeeeeecaaaaeeeeeeeessesesaeeeeeees 91 20 9 No REM ref mic detected A 91 2021 0 7 Invalid REM Calibrations 22 duegeeee EE de deed 91 20 11 REM speaker overdriven ttnn n tnnt t EEEE EESASE EEEE EEEn nnen nEnE nnana ennnen n 92 20 12 Barcode scanner malfunction 20 0 0 cece eeceneee eee e ee eteeceaaee eee eeeeeecaaaeeeeeeeeeeeeeaaaaeeeeeeeettessaaaeeeeees 92 21 Technic
113. nd center the red line on the barcode from a distance of 6 8 The scanner will beep and the Barcode Entry poster opens 2 Highlight and lt PICK gt Done to accept the data indicated on the poster To enter assessment data and parameters manually 1 Highlight and lt PICK gt Audiometry Audiometry Ear Right 2 Highlight and lt PICK gt Transducer then highlight transducer Headphone and lt PICK gt from the list Threshold Kees 3 Highlight and lt PICK gt REUR then highlight and REUR Average O lt PICK gt to toggle selection Cancel Continue Measured REUR should be used with a soundfield threshold because individual REUR is part of the threshold Average REUR should be used with headphone or insert phone thresholds because individual REUR isn t part of these thresholds 4 When all selections have been completed press lt Continue gt 5 Enter HL threshold values using a mouse or keypad Left click the mouse on the audiogram form to enter a point Click again to delete the point On the keypad use the arrow keys to change frequency and level and press lt PICK gt to enter or delete a threshold point 6 Press lt Continue gt when all points have been entered FastFacts 16 4 Audiometric data entry RM500SL User s Guide Version 2 8 Page 66 16 5 REUR measurement procedure Performing a REUR test erases all existing REAR and REIG data for the current test ear REUR sho
114. necting strip 3 Plug the pill s cable into the battery pill jack inside the RM500SL HIT test chamber to the left of the coupler microphone connection 4 Turn the hearing instrument on FastFacts 2 5 Battery pill use and care 0611 RM500SL User s Guide Version 2 8 Page 12 2 6 Mouse keyboard barcode scanner The RM500SL may be operated from the built in keypad a USB mouse not included or a standard USB computer QWERTY keyboard not included which may also be used to enter headers and comments on printouts See 3 2 Input device operation An optional barcode scanner may be connected to the USB port to enter threshold UCL and RECD data directly from a RM500SL or Verifit printout Barcoded threshold data printed by some Grason Stadler audiometric equipment may also be scanned Scanners other than that supplied by Audioscan may not work and are not supported by Audioscan Multiple USB devices may be used together by connecting them to the RM500SL USB port via a USB hub the European Community if this device is connected to one or more other devices to make a system the CE mark on this device is only valid if the other devices in the system carry a CE mark in respect of the Medical Device Directive and if the supplier has stated that the requirements of the Medical Device Directive will be met for this particular combination FastFacts 2 6 Mouse keyboard barcode scanner 0611 RM500SL User s Guide Version 2 8 Pag
115. ng discomfort for loud sounds Originally speech was simulated using amplitude modulated tonal signals The RM500SL replaces these simulated speech signals with real speech both recorded and live For details of the test signals and analysis methods see 19 Soeechmap Technical Details Speechmap departs from insertion gain target methods in presenting amplification goals in the context of the residual auditory area not as an isolated target line and in the use of real speech not tones or broad band noise This is extremely important for non linear hearing aids analog or digital because their processing is signal dependent It also makes provision to correct audiometric data and 2cc coupler measurements for age related or individually measured acoustic differences between real ears and the couplers used for calibration and testing The Speechmap environment provides two hearing instrument verification options REM real ear measurement and S REM simulated REM See 17 9 REM or S REM mode for details FastFacts 17 2 Speechmap facts RM500SL User s Guide Version 2 8 Page 70 0611 17 3 DSL 5 0 in Speechmap The Desired Sensation Level DSL method is a systematic eardrum sound pressure level GPLogram approach to hearing instrument fitting that seeks to ensure amplified speech will be audible and comfortable while loud sounds will not be uncomfortable It takes into account individual acoustic factors in audiometric and ele
116. ng instrument the HIT reference microphone must be positioned as close as possible to the hearing instrument s microphone without actually touching it v The noise or feedback reduction features are attempting to reject the test signal These need to be disabled prior to tests with tones or noise v The instrument is on the verge of feedback due to a poor seal to the coupler unplugged vent or a crack in the tubing on the BTE coupler FastFacts 20 4 HIT curves inconsistent 0611 RM500SL User s Guide Version 2 8 Page 89 20 5 HIT curves differ from specifications The OSPL90 and response curves don t look like the manufacturer s v Check that all controls or program settings are the same as those used by the manufacturer Check that vents on earmolds or ITE instruments are plugged at the faceplate Check that ITE instruments are well sealed to the coupler When puttying a hearing instrument into the ITE coupler be sure to keep the canal portion of the instrument flush with the inside of the 2cc volume Ensure that the HIT chamber is sealed tightly Ensure that the HIT microphone calibration was performed correctly Check that the coupler is screwed tightly onto the coupler microphone FastFacts 20 5 HIT curves differ from specifications 20 6 HIT speaker overdriven HIT speaker overdriven This message indicates that the test chamber speaker is unable to produce the SPL required for a test v Check that the te
117. nnecting 1 Carefully unpack the RM500SL and check the contents of the shipping box against the enclosed packing list Note that some parts may be packed inside the test chamber Press down firmly onthe Press down firmly on the lid to release t j lid and return the latch LetURight to the closed positi 2 Unwrap the power cord from its stowage hooks noting carefully how it has been packed To avoid serious damage to the display screen always repack the cord this way 3 Connect the power cord to the socket next to the power switch on the right side of the unit Plug the other end into a grounded 100 240 volt power outlet FastFacts 2 2 Unpacking and connecting 0611 RM500SL User s Guide Version 2 8 2 3 Microphone connection 1 Plug the reference microphone and the coupler microphone into the connectors in the test chamber as shown lt COUPLERMICROPHONE REFERENCE MICROPHONE 2 Plug the probe microphone assembly into the probe connector located at the left of the test chamber as shown NOTE A microphone extension cable VA 130 is available from Audioscan Standard audio extension cables should not be used They will substantially increase noise levels FastFacts 2 3 Microphone connection 0611 RM500SL User s Guide Version 2 8 Page 11 2 4 Microphone care Coupler microphone 1 DO NOT twist the cable when attaching a coupler to the coupler microphone Turn only the coupler or unplug
118. o 2cc coupler values by using age appropriate average or measured if available RECD values and the appropriate microphone location effects for the desired style of hearing instrument The gain values given assume the hearing instrument is linear for a 70 dB speech input This assumption is necessary to allow the microphone location effects to be incorporated For BTE and body aids the 2cc coupler values provided assume a fully occluding earmold with 13 tubing extending to the medial tip of the earmold If a different type of mold is used alterations to these values should be made to account for the different acoustic characteristics For CIC instruments the 2cc values take into account that the instrument when deeply inserted into the ear canal will produce a greater SPL in the ear than that measured in the ITE coupler FastFacts 11 3 Graph table or 2cc target format 0611 RM500SL User s Guide Version 2 8 Page 55 11 4 SPL or HL scale In Speechmap and Insertion gain tests you may view results in either dB HL or dB SPL Insertion gain tests view the hearing aid as improving the sound field threshold In Insertion gain the HL scale presents aided results as improved sound field thresholds while the speech region remains fixed Speechmap tests view the hearing aid as increasing the ear canal SPL Speech gets louder but the threshold remains fixed On the HL scale in Speechmap normal ear canal threshold becomes the 0 dB HL line
119. on To enter data from a barcode see 3 3 Barcode data input and 1 Press the barcode trigger and center the red line on the barcode from a distance of 6 8 The scanner will beep and the Barcode Entry poster opens 2 Highlight and lt PICK gt Done to accept Audiometry the data indicated on the poster Ear Right Targets DSL adult Age Adult H 1 Highlight and lt PICK gt Audiometry Transducer Headphone Kee 1 Threshold Entered 2 Highlight and lt PICK gt an item to toggle its Bone conduction NIA To enter assessment data manually setting or generate a list box Age canbe uct Average changed only if Targets DSL child See REcD Average 18 3 Assessment data choices 1 and Binaural Yes 18 4 Assessment data choices 2 REDD Average 3 Press lt Continue gt to proceed to data entry EE 4 Enter HL threshold using a mouse keypad or keyboard Left click the mouse on the audiogram to enter a point Click again to delete the point On the keypad the arrow keys change frequency and level and lt PICK gt enters or deletes a threshold point On a keyboard enter HL values on the numeric keypad 5 Press lt Continue gt when all points have been entered 6 Repeat the process for Bone conduction UCL and RECD if Enter has been selected for any If RECD is set to Measure see 15 RECD real ear to coupler difference FastFacts 18 2 Assessment data entry RM500SL User s Guide Vers
120. ophone location effects RM500SL User s Guide Version 2 8 Page 86 0611 19 5 Speech signal analysis One of the most used measures of a speech signal is the long term average speech spectrum LTASS This is a 1 3 octave spectrum averaged over a sufficiently long portion of the speech material to provide a stable curve In practice a 10 second average meets this requirement and for this reason all RM500SL passages are at least 10 seconds long The dynamic nature of speech is often characterized by the distribution of short term levels in each 1 3 octave band These levels are determined by calculating a spectrum for each of a series of short time periods within the passage Historically time periods of 120 125 or 128 ms have been used The RM500SL uses a 128 ms time period resulting in 100 levels or samples in each 1 3 octave band fora 12 8 second passage The level in each band that is exceeded by 1 of the samples called either the 1 or 99 percentile has historically been referred to as the speech peak for that band The curve for these 1 levels is approximately 12 dB above the LTASS The level in each band that is exceeded by 70 of the samples called either the 70 or 30 percentile has historically been called the valley of speech for that band The curve for these 70 levels is approximately 18 dB below the LTASS The region between these two curves is often called the speech region speech envelope or speech banana
121. or a stimulus level of 0 dB off the Manual control mode allows the RM500SL to be used as a sound level meter Sound at the HIT reference microphone and the coupler microphone may be analyzed by 1 12 octave A weighted or C weighted filters A and C weighted measurements are limited to frequencies above 100 Hz and the averaging time and update rate are 384 ms 1 Press lt Tests gt then highlight and lt PICK gt Manual control 2 Highlight and lt PICK gt the Level window then highlight and lt PICK gt 0 dB stimulus level from the drop down list 3 Highlight and lt PICK gt the Filter window then highlight and lt PICK gt 1 12 octave A weighted or C weighted from the drop down list 4 For 1 12 octave filter highlight and lt PICK gt the Frequency window then highlight and lt PICK gt the desired frequency from the drop down list 5 Highlight and lt PICK gt Start test to start the test Start test changes to Stop Test To stop the measurement highlight and lt PICK gt Stop test You may change Level and Frequency without stopping the test NOTE A microphone extension cable VA 130 is available from Audioscan Standard audio extension cables should not be used They will substantially increase noise levels FastFacts 9 8 Sound level meter using manual control RM500SL User s Guide Version 2 8 Page 49 10 Real Ear Measurement Setup 10 1 Section overview For safe and effective operat
122. orded with no spectral shaping Live speech may also be used As a result of reanalysis of published data the previous distinction between soft and average vocal effort has been eliminated Consequently the soeech and ICRA signals are presented unfiltered for levels from 50 to 70 dB SPL At 75 dB SPL the spectrum is filtered to represent a loud vocal effort An own voice filter is also available at the 75 dB SPL level This is intended to produce a spectrum and level at a BTE microphone location similar to that produced by the voice of an average wearer A tone burst MPO stimulus provides 128 changed from 64 ms bursts at 1 3 octaves with a level of 90 dB SPL in S REM and 85 dB SPL in REM mode In S REM mode all signals are filtered to include BTE ITE ITC CIC Body microphone location effects The selected overall rms level is established prior to filtering For fitting FM systems the stimuli may be modified to represent the level 84 dB SPL and spectrum at a chest microphone location and the level 93 dB SPL and spectrum at a boom microphone location These are presented in the test box in both REM and S REM modes The overall SPL 1 3 octave band SPL vocal effort and microphone location effects are given in the following tables for the various broad band signals available FastFacts 19 2 Speechmap stimuli RM500SL User s Guide Version 2 8 Page 84 0611 19 3 Stimulus levels 1 3 octave band
123. orm C weighted A weighted or 1 12 octave analysis of sound as measured by the probe and reference microphones A and C weighted measurements are limited to frequencies above 100 Hz and the averaging time and update rate are 384 ms 1 Refer to 10 Real Ear Measurement Setup to prepare the system for use and for proper positioning of the client and the probe tube 2 Press lt Tests gt then highlight amp lt PICK gt Manual control in the REM column 3 Highlight and lt PICK gt the Level window then highlight and lt PICK gt 0 dB stimulus level from the drop down list 4 Highlight and lt PICK gt the Filter window then highlight and lt PICK gt 1 12 octave A weighted or C weighted from the drop down list 5 For 1 12 octave filter highlight and lt PICK gt the Frequency window then highlight and lt PICK gt the desired frequency from the drop down list 6 Highlight and lt PICK gt Start test to start the test Start test changes to Stop Test To stop the measurement highlight and lt PICK gt Stop test You may change Level and Frequency without stopping the test FastFacts 12 3 Sound level meter using REM probe RM500SL User s Guide Version 2 8 Page 57 13 Sensory Loss Simulator 13 1 Sensory loss simulator description A pure conductive loss attenuates loud and soft sounds equally and is easily simulated by just turning down the volume or inserting an earplug Losses of a sensory nature are mo
124. r can cause erratic operation Such replacement should be done only when authorized and ONLY by an Audioscan service representative FastFacts 3 7 Program memory removal and replacement 0611 RM500SL User s Guide Version 2 8 Page 19 3 8 Software updating Software updates along with a new User s Guide are shipped on a CD ROM The software must be transferred to the USB flash drive in the RM500SL in order to be used This transfer requires a PC with a CD ROM drive and a USB port To update the RM500SL software 1 Refer to 3 7 Program memory removal and replacement and remove the USB flash drive from the RM500SL 2 Insert the software update CD ROM into the CD ROM drive on your PC 3 Double click on My Computer then double click on the CD ROM drive 4 Double click on rm500sl_update exe and follow instructions to complete the update 5 Remove the USB memory stick from the PC 6 Refer to 3 7 Program memory removal and replacement and install the USB flash drive in the RM500SL See 1 3 Electronic user s guide for help in accessing the new User s Guide FastFacts 3 8 Software updating 4 General Setup 4 1 Section overview This section covers the following topics 4 2 Date and time setup 4 3 Display settings 4 4 Saving test setup FastFacts 4 1 General setup 4 2 Date and time setup To set the date and time that appears on printouts and calibration screens 1 Press lt Setup gt then hi
125. ransducer Headphone UCL Average RECH Average REDD Average REAR Stimulus Level SII UO 2 Ol Speech shape Avg 60 35 3 9 Al Ol Unaided 22 Curve Hide Show O Figure 9 When LTASS is at threshold SII 33 which corresponds approximately to SRT 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1GO USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com Page 8 140 130 120 110 100 90 80 70 60 50 40 30 20 10 Ki Speechmap Single view 250 500 audioscan EIS instrument BIE Zo _ Mode S REM SO Presentation Single view 30 Format Graph ZO Seale dB SPL Zo Audiometry O Age Adult _ Transducer Headphone UCL Average RECH Average REDD Average REAR Stimulus Level Sil DS 2 9 3 OlfSpeech shape Avg 65 79 ee a ao SMS Unaided 22 Curve Hide Show OO 1000 2000 4000 8000 Figure 10 The highest SII is obtained when the entire speech envelope is above threshold 0 00 5 00 10 00 15 00 20 00 25 00 BAND SPL dB re overall SPL 30 00 35 00 40 00 200 Long Term Average 1 3 Octave Spectra LTASS for Speech Signals Average Effort re overall SPL for entire passage Hanning window 128 ms average LTASS re overall SPL STANDARD LTASS re overall SPL FEMALE
126. re complex and more difficult to simulate The most common sensory loss is caused by outer hair cell damage and results in loss of audibility for soft sounds but near normal loudness for loud sounds Inner hair cell damage elevates threshold and reduces loudness for both soft and loud sounds possibly somewhat more for soft sounds This sensory loss simulator SLS is intended to allow normal hearing listeners to hear sounds as if they had the elevated threshold and altered loudness perception caused by outer and inner hair cell damage It is based on the cochlear hearing loss model described in Moore amp Glasberg 2004 In this simulation losses less than 58 dB SPL are considered to be due entirely to outer hair cell damage Any loss greater than this is considered inner hair cell loss This SLS does not simulate broadening of the auditory filters or other distortions that may accompany cochlear hearing loss For comparison purposes a simulation of a purely conductive loss is also provided To properly experience the simulation listeners should be within 1m of the REM speaker and in a quiet room FastFacts 13 1 Sensory loss simulator description 13 2 Sensory loss simulator operation Listeners should be within 1m of the REM speaker and in a quiet room 1 Press lt Tests gt then highlight and lt PICK gt Sensory loss simulator 2 If an audiogram has previously been entered in Speechmap or Insertion gain go to step 4 O
127. reach an optimum fitting NOTES If the FM system automatically reduces EM gain when FM is received FM priority set the LTASS at the targets in both EM and FM operation For procedures requiring a long coupler mic cable see 2 3 Microphone connection FastFacts 18 9 FM fitting and verification RM500SL User s Guide Version 2 8 Page 83 19 0611 Speechmap Technical Details 19 1 Section overview Speechmap provides a variety of stimuli for the testing of non linear hearing aids with a range of digital processing features This section covers the following topics 19 2 Speechmap stimuli 19 4 Microphone location effects 19 3 Stimulus levels 19 5 Speech signal analysis For additional information see 24 Appendix 1 AudioNote 2 1 VERIFIT and RM500SL Test Signals and Analysis FastFacts 19 1 Speechmap technical details 19 2 Speechmap stimuli The Speechmap fitting environment provides a number of well controlled distinctly different stimuli These include three varieties of speech standard previously shaped female child ICRA noise digitally distorted speech and pink noise at levels of 50 to 75 dB SPL in 5 dB steps and a tone burst at 85 or 90 dB SPL The two standard speech signals are by the same male talker The spectrum has been filtered to closely match the Cox amp Moore 1988 long term average speech spectrum LTASS The ICRA noise female and child speech signals are presented as rec
128. s Ear and Hearing 12 268 280 Martin H C Munro K J amp Langer D H 1997 Real ear to coupler differences in children with grommets British Journal of Audiology 31 63 69 Moodie K S 1996 A practical approach to hearing aid selection BSA News 18 6 8 Moodie K S Seewald R C amp Sinclair S T 1994 Procedure for predicting real ear hearing aid performance in young children American Journal of Audiology 3 1 23 31 Moore BrianC J amp Glasberg Brian R 2004 A revised model of loudness perception applied to cochlear hearing loss HearingResearch 188 2004 70 88 Mueller H G amp Bright K E 1994 Selection and verification of maximum output In Valente M ed Strategies for Selecting and Verifying Hearing Aid Fittings New York Thieme Medical Publishers 38 63 Pavlovic C V 1991 Speech recognition and five articulation indexes Hearing Instruments 42 9 20 23 Pearsons K S Bennett R L amp Fidell S 1977 Speech levels in various noise environments Project Report On Contract 68 01 2466 Washington DC US Environmental Protection Agency Scollie S D Seewald R C Cornelisse L E amp Jenstad L M 1998 Validity and repeatability of level independent HL to SPL transforms Ear and Hearing 19 5 407 413 Scollie S D Seewald R C Moodie K S Dekok K 2000 Preferred listening levels of children who use hearing aids Comparison to prescriptive targets JAAA 11 230 23
129. s 12 1 REM Manual Control 0611 RM500SL User s Guide Version 2 8 Page 56 12 2 Manual control measurements 1 Refer to 10 Real Ear Measurement Setup to prepare the system for use and for proper positioning of the client and the probe tube 2 Press lt Tests gt then highlight and lt PICK gt Manual control 3 Highlight and lt PICK gt the Level window then highlight and lt PICK gt the desired stimulus level from the drop down list 4 Highlight and lt PICK gt the Frequency window then highlight and lt PICK gt the desired frequency from the drop down list Distortion measurement data is available only from 200 2500 Hz 5 Highlight and lt PICK gt Start test to start the test Start test changes to Stop Test To stop the measurement highlight and lt PICK gt Stop test You may change Level and Frequency without stopping the test Level ZO d ZOUH Frequency Distortion 75 Ki An Shahan nh ah an al D 10 20 30 40 50 60 70 80 90 100 Probe microphone 78 5 dB MrT ananassae EECH 0 10 20 30 40 50 60 70 80 90 100110120130 Reference microphone 70 0 dB g VA ae e LI be ai J tan bel 0 10 20 30 40 50 60 70 80 90 100110120 l 130 Gain 8 5 dB ith tt ah a he aa o 10 20 30 40 50 60 70 80 90 100 FastFacts 12 2 Manual control measurements 12 3 Sound level meter using REM probe The manual control feature enables the RM500SL to be used as a sound level meter to perf
130. s warranted against defects for two years from date of purchase Within this period it will be repaired without charge for parts labor or return shipping when returned prepaid to your authorized Audioscan service agent This warranty does not apply to battery substitutes pills which carry a 90 day warranty or to equipment that in our sole judgement has been subject to misuse or unauthorized alteration or repair Trademarks Audioscan Verifit Soeechmap and Quikscan are registered trademarks of Etymonic Design Inc DSL is a registered trademark of The University of Western Ontario HP LASERJET is a registered trademark of Hewlett Packard Company IBM is a registered trademark of International Business Machines Corporation K AMP is a registered trademark of Etymotic Research Inc KEMAR is a registered trademark of Knowles Electronics Inc QUEST is a trademark of Quest Technologies Inc PostScript is a registered trademark of Adobe Systems Inc Acknowledgements In addition to the contributions of our entire staff we acknowledge the support received from past and present staff at the National Centre for Audiology at the University of Western Ontario in implementing the DSL method DSL 5 0 is used under license from the University of Western Ontario UWO We are indebted to the University of Memphis Hearing Aid Research Laboratory for permission to use some of their recorded speech material FastFacts 1 4 Warranty trademarks acknowled
131. several ways This section covers the following topics 11 2 REM right or left ear display 11 4 SPL or HL scale 11 3 Graph table or 2cc target format 11 5 Hide or show REM curves FastFacts 11 1 REM screen setup 11 2 REM right or left ear display The RM500SL can retain and display REM test results for two ears To switch between left and right test results press the lt Left Right gt key FastFacts 11 2 REM right or left ear display 11 3 Graph table or 2cc target format Most REM test screens may be viewed in graphic or tabular format v In RECD highlight and lt PICK gt Format to toggle between Graph and Table views In Speechmap and Insertion gain highlight and lt PICK gt Format then highlight and lt PICK gt Graph Table or 2cc targets from the drop down list In 2cc targets format reserve gain and fitting formula may be changed Highlight amp lt PICK gt the appropriate window then highlight amp lt PICK gt the reserve gain or fitting formula from the drop down list In Speechmap if DSL or NAL NL1 has been selected as a target method then 2cc coupler targets for user gain full on gain and OSPL90 are provided The full on gain is just the user gain plus the reserve gain If no target method has been selected only 2cc OSPL90 values are indicated Target gains are for speech like signals at a 70 dB input SPL OSPL90 targets are for 90 dB pure tones Real ear targets are converted t
132. ssary Speechmap DSL 5 adult Singleview gt gt a UudioScar 140 tela instrument BTE 130 X f _ Mode S REM Presentation Single view Format Graph Seale dB SPL 120 D l0 l6 l0 AlO STEP 1 l Audiometry lO Age _ Transducer UCL Average BECH Average BCT M Binaural No REDD Average Adult Headphone REAR Stimulus Level Sil 1 Of Speech std 1 Soft 50 37 e ES 231 O1 Ale Unaided avg 60 19 8000 Curve Hide i Show C FastFacts 18 5 Fitting to targets for soft speech RM500SL User s Guide Version 2 8 Page 80 18 6 Fitting to targets for loud sounds 0611 4 Select REAR 2 amp set stimulus to MPO In S REM mode a 90 dB tone sweeps continuously In REM mode the tone sweeps when you press lt Continue gt 5 In S REM mode adjust high level gain and or output limiting e g MPO PC so the curve matches the REAR90 targets DSL or approaches but doesn t exceed the RESR targets NAL NL1 at all frequencies Press lt Continue gt to record the MPO curve In REM mode advise the client to point to the screen if a sound becomes too loud during the test see 10 5 Max TM SPL setup Press lt Continue gt to run and record a single sweep Adjust the gain and output for loud sounds as for S REM factoring in client response Repeat as necessary Speechmap
133. st chamber lid is closed and sealed v Check that the HIT calibration looks normal v Check that the hearing instrument under test is not feeding back v Try running a REM test FastFacts 20 6 HIT speaker overdriven 20 7 No HIT reference mic detected No HIT reference mic detected This message may be displayed when starting a hearing instrument test It indicates that the RM500SL is not measuring any sound at the HIT reference microphone The HIT reference microphone is the white microphone located in the test chamber v Ensure that the white HIT reference microphone is secure Unplug it and plug it in again ensuring that it clicks into place Try the HIT calibration procedure again Unplug the HIT reference microphone and plug the REM probe microphone in its place Try HIT calibration using the reference microphone of the REM probe microphone in place of the HIT reference microphone If this is successful the HIT reference microphone is defective and must be replaced FastFacts 20 7 No HIT reference mic detected 0611 RM500SL User s Guide Version 2 8 Page 90 20 8 Invalid HIT calibration Invalid HIT Calibration This message may be displayed during the HIT calibration procedure It indicates that the calibration curve is significantly different from what is expected It may be accompanied by a missing HIT reference microphone error v Check that the there is no coupler on the coupler microphone and that
134. that is an integer multiple of the lowest frequency component fundamental Harmonic Distortion the addition of harmonic components to a signal The rms value of a harmonic component of a signal as a percentage of the rms value of the fundamental If less than 20 the rms value of the total signal may be used instead of the fundamental HFA High Frequency Average the average of values in dB at 1000 1600 and 2500 Hz ANSI S3 22 HL Hearing Level the hearing threshold referenced to the threshold of normal hearing expressed in dB HI Hearing instrument HIT Hearing instrument test Input Compression a form of AGC in which the signal level is regulated before the volume control Input Output function steady state single frequency plot of the coupler SPL on the ordinate as a function of input SPL on the abscissa with equal decibel scale divisions on each axis ANSI 3 22 ITE In The Ear hearing aid Kneepoint compression threshold the point on an input output curve at which the slope digresses from unity indicating the signal level at which a non linear process begins to take effect LCD liquid crystal display A thin planar information display Linear Region that portion of the input output function which is a straight line at 45 degrees Linear Amplification amplification having the same gain for all input levels until the maximum output of the device is reached LTASS Long term average speech spectrum the rms l
135. the microphones are correctly positioned for HIT calibration Check that the coupler microphone is securely plugged into the correct socket Follow the suggestions in 20 7 No HIT reference mic detected FastFacts 20 8 Invalid HIT calibration 20 9 No REM ref mic detected No REM reference mic detected Check connection on the REM probe microphone v Check that a probe microphone assembly is securely plugged into the PROBE socket to the left of the test chamber Unplug the HIT reference microphone in the test chamber and plug the REM probe microphone in its place Try HIT calibration using the reference microphone of the REM probe microphone in place of the HIT reference microphone If this is fails the REM probe microphone is defective and must be replaced FastFacts 20 9 No REM ref mic detected 20 10Invalid REM calibration Invalid REM Calibration This message may be displayed during the REM calibration procedure It indicates that the calibration curve is significantly different from what is expected It may be accompanied by a REM reference microphone error v Check that a probe microphone assembly is securely plugged into the PROBE socket to the left of the test chamber v Try using a new probe tube Ensure it is correctly attached and positioned Try the steps in 20 9 No REM ref mic detected Unplug the coupler microphone from the test chamber and plug the REM probe microphone in its place Position the
136. the USB port 2 Press lt Setup gt then highlight and lt PICK gt Printing 3 Highlight Page setup and press lt PICK gt to display the page setup poster 4 To print the date and time on each printout highlight and lt PICK gt Date 5 To print lines for handwritten notes highlight and lt PICK gt Lines 6 To add barcodes for audiometric data highlight and lt PICK gt Barcode 7 To print a fixed header on printouts highlight and lt PICK gt Header Connect a keyboard to the USB port and enter the desired header up to 35 characters Press lt PICK gt or Enter key on the keyboard number pad to complete the entry To be prompted for a new header for each printout highlight and lt PICK gt Ask To print fixed comments following a printout highlight and lt PICK gt Description Connect a keyboard to the USB port and enter comments Press lt PICK gt or Enter on the keyboard number pad to complete the entry To be prompted for new comments for each printout highlight and lt PICK gt Ask To be prompted for a file name when you print to a USB memory stick or a network file highlight and lt PICK gt Ask Do not use space or tab in the file name USB file names are limited to 8 characters See 6 7 Printing to a network file 10 Press lt Continue gt to exit page setup and lt Continue gt to exit Setup FastFacts 6 3 Barcodes headers and comments on printouts 6 4 Local printer
137. the coupler microphone before turning it 2 DO store the coupler microphone in its mounting clip when transporting 3 DO make sure that the 2cc coupler is tightly screwed to the coupler microphone when performing hearing instrument tests Coupler leakage can cause feedback and erratic response curves 4 DO ensure there are no cracks in the 13 tubing on the BTE HA 2 coupler 5 DO replace the tubing on the BTE coupler with 3 8 10 mm of 13 tubing Probe microphone 1 DO NOT reuse probe tubes Debris and liquid from cleaning attempts can lodge in the enlarged base of the probe tube and subsequently clog the probe microphone port 2 DO NOT attempt to open or repair the probe microphone Attempting to repair the probe module may lead to damage or alteration of the factory calibration 3 DO keep the probe module and probe tubes in a clean area 4 DO stow the probe module when not in use or when transporting the RM500SL FastFacts 2 4 Microphone care 2 5 Battery pill use and care Battery pills are optional The thin connecting strip of each battery pill is fragile When inserting pills into hearing instrument battery compartments take care that this strip is not pinched or bent severely as the battery door is closed 1 Select a battery pill that is appropriately sized for the hearing instrument that you are testing 2 Insert the pill into the hearing instrument carefully closing the battery door over the thin con
138. therwise highlight and lt PICK gt Audiometry 3 Enter HL threshold values using a mouse or the keypad Left click the mouse on the audiogram form to enter a point Click again to delete the point On the keypad use the arrow keys to change frequency and level and press lt PICK gt to enter or delete a threshold point 4 Press lt Continue gt when all points have been entered See 16 4 Audiometric data entry or 18 2 Assessment data entry for more details 5 Highlight and lt PICK gt Start test Sound processed to simulate the entered hearing loss will be presented via the REM speaker 6 Highlight and lt PICK gt Stimulus then highlight and lt PICK gt a sound to play 7 Highlight and lt PICK gt Hearing then highlight and lt PICK gt from Normal 1 Entered loss Entered loss 8 Highlight and lt PICK gt Type of loss to toggle between Sensorineural and Conductive hearing loss simulations 9 Highlight and lt PICK gt Cancel to stop the simulation FastFacts 13 2 Sensory loss simulator operation 0611 RM500SL User s Guide Version 2 8 Page 58 0611 14 Occlusion Effect Test 14 1 Occlussion effect measurement 1 Refer to 10 Real Ear Measurement Setup to prepare the system for use and for proper positioning of the client and the probe tube 2 Insert the earmold or custom hearing instrument into the ear being careful not to advance the probe tube further into the ear canal A lubricant
139. tion RM500SL User s Guide Version 2 8 Page 24 6 0611 Printing and Storing Results 6 1 Section overview Pressing lt Print gt will cause the current screen image to be printed on the internal printer on an external local printer on a network printer on a Windows shared printer on a networked PC or saved to file on a USB memory stick or a Windows shared file on a networked PC Date time barcoded audiometric data and fixed or variable headers and comments via a connected keyboard may be added to printouts but not when saving to a file Session data may also be saved as a delimited text file to a USB memory stick or in a Windows shared folder on a networked PC for further analysis The following topics are covered in this section 6 2 Internal printer paper loading 6 3 Barcodes headers and comments on printouts 6 4 Local printer setup 6 5 Printing to a USB memory stick 6 6 Network printer setup 6 7 Printing to a network file 6 8 Data storage to a network file FastFacts 6 1 Printing and storing results RM500SL User s Guide Version 2 8 Page 25 6 2 Internal printer paper loading 0611 On screen instructions on paper replacement are provided if you try to print to the internal printer when it is out of paper or when the paper lever has been raised To load a new roll of paper Lift the printer head using the small black lever to the left of the printer Press the lt Print gt key for on s
140. to allow Anonymous Logon to print to the shared printer 1 Press lt Setup gt then highlight and lt PICK gt Printing 2 Highlight amp lt PICK gt Other network printer or Windows shared printer 3 Highlight amp lt PICK gt Printer details automatic if printer type is set to None 4 Highlight amp lt PICK gt Printer type then select from Deskjet Color 1 single ink cartridge Deskjet Color 2 both color and black ink cartridges Laserjet Black or PostScript Check Black only for black printouts on a color printer 5 Connect a computer keyboard to the USB port and fill in the boxes with the requested information Highlight and lt PICK gt each box to open it for data entry and again to close it or use the Enter key on the keyboard s numeric keypad Obtain needed information from your network administrator Windows network printer Other network printer Printer type HP Deskjet Color 2 O Black only Cl O Printer type HP Laserjet Black ZO Hewlett Packard Deskjet tm color printer with Hewlett Packard Laserjet tm separate black and color cartridges printer Computer MAD1 oO Case Share name Sensitive IP Address Port 9100 fe Username Dave oO P d asswor Cancel e Continue Test connection O FastFacts 6 6 Network printer setup 0611 RM500SL User s Guide Version 2 8 Page 29 6 7 Printing to a network file To save the screen image as a file on a network PC you
141. toscope to ensure there is no ear canal obstruction e g cerumen and to get a sense of ear canal length 2 Install a new probe tube on the probe module Set the black marker ring approximately 28 mm from end of probe tube for adult females approximately 30 mm from end of probe tube for adult males and approximately 20 25 mm from end of probe tube for children These positions may be modified based on the otoscopic examination Tip the probe module body is 28 mm long 3 Hang the probe module on the ear as shown The reference microphone should face outwards 4 Adjust the blue cord until the probe module is snug against the head directly below the earlobe cheek level To facilitate this clip the probe module cable to clothing on the side opposite the test ear and draw the cable snug 5 Hold the front blue cord so that it passes behind the ear canal entrance and pass the end of the probe tube in front of the blue cord and into the ear canal 6 Carefully slide the probe tube into the ear canal until the marker ring approaches the intertragal notch Then let the front blue cord move forward to hold the probe tube in place Use an otoscope to verify that the tube is 2 to 5 mm from the eardrum FastFacts 10 8 Positioning the probe tube 0611 RM500SL User s Guide Version 2 8 Page 54 11 REM Screen Setup 11 1 Section overview To accommodate your working preferences the appearance of REM screens may be changed in
142. ts 8 4 ANSI 1996 Linear and AGC tests Press lt Tests gt then highlight and lt PICK gt Linear or AGC Highlight and lt PICK gt Start test test setup instructions will be displayed Refer to 7 11 Coupling the hearing instrument 7 12 Positioning the hearing instrument and 2 5 Battery pill use and care to prepare the instrument for testing Turn the instrument ON Set the gain control manual or programmable to maximum with all other controls set to provide the widest frequency response greatest gain and highest maximum output AGC controls and or programmable parameters should be set as designated by the manufacturer Press lt Continue gt to run the test or press lt Cancel gt to abort the test Note that if required the RM500SL will pause during the test to request that the volume control be adjusted to the Reference Test Position RTP Open the HIT chamber if necessary and without moving the hearing instrument adjust the user gain control until the large vertical arrow on the screen prompt disappears Press lt Continue gt to resume the test If you are unsure which test sequence to run try AGC first If attack and release times are all near zero the instrument is probably linear FastFacts 8 4 ANSI 1996 Linear and AGC tests 0611 RM500SL User s Guide Version 2 8 Page 39 0611 8 5 ANSI 2003 Linear and AGC tests 1 Press lt Tests gt then highlight and lt PICK gt Linear or AGC 2 Highli
143. ts 7 12 Positioning the hearing instrument RM500SL User s Guide Version 2 8 Page 37 8 ANSI 3 22 Hearing Aid Tests 8 1 Section overview These Hearing Instrument Tests follow the procedures of ANSI S3 22 1996 or ANSI 3 22 2003 as selected in Setup See 7 6 1996 or 2003 ANSI standard Linear An automated test sequence for linear hearing aids per ANSI 3 22 AGC An automated test sequence for AGC hearing aids per ANSI 3 22 Input Output 1 4 curves of coupler SPL vs input SPL at 25 5 1 2 and 4 kHz Telecoil STS 1996 simulated telephone sensitivity or RSETS 2003 relative simulated equivalent telephone sensitivity using a coil in the test chamber floor This section covers the following topics 8 2 ANSI S3 22 1996 facts 8 7 ANSI input output curves 8 3 ANSI S3 22 2003 facts 8 8 ANSI telecoil terminology 8 4 ANSI 1996 Linear and AGC tests 8 9 ANSI telephone simulator TMFS test 8 5 ANSI 2003 Linear and AGC tests 8 10 Telecoil test results 8 6 ANSI test results FastFacts 8 1 ANSI S3 22 hearing aid tests 8 2 ANSI S3 22 1996 facts The RM500SL performs selected hearing instrument tests in accordance with ANSI S3 22 1996 This standard expresses some outputs and gains as High Frequency Average HFA values The HFA is the average of values at 1000 1600 and 2500 Hz If a hearing aid meets certain conditions the manufacturer may choose other averaging frequencies called Special Purpose Average SPA
144. uld be measured only if Transducer Soundfield Otherwise it is more accurate to use average See 16 4 Audiometric data entry 1 Press lt Tests gt then highlight and lt PICK gt Insertion gain from the REM list 2 Referring to 10 Real Ear Measurement Setup and 11 REM Screen Setup prepare the system position the patient and insert the probe tube 3 If REUR is set to Average highlight and lt PICK gt Audiometry then highlight and lt PICK gt REUR to toggle to Measure Press lt Continue gt to advance to the Threshold entry poster You may enter threshold data at this time see 16 4 Audiometric data entry or press lt Continue gt to proceed with the measurement 4 Highlight and lt PICK gt REUR below REAR REIG test 3 5 Press lt Continue gt to accept the default 55 dB SPL Pink noise stimulus and capture the REUR curve OR highlight and lt PICK gt Stimulus and Level to select other values These choices have no impact on the resulting REIG 6 If there is a notch in the 4000 to 8000 Hz region try advancing the probe tube 2 mm and repeating step 3 If the notch moves to a higher frequency repeat this step until the notch moves beyond the highest frequency of interest Because it is analyzed in 1 3 octave s bands the Noise stimulus produces a 40 REUR 12 dB below that produced by the 2 Swept stimulus at the same overall level The Average REUR used is shown at De right Measured REUR will vary fro
145. urement RM500SL User s Guide Version 2 8 Page 59 15 RECD real ear to coupler difference 15 1 Section overview The RECD measurement procedure may be accessed by selecting RECD from the REM tests list or from the Audiometry poster within Speechmap An optional RECD transducer is required for RECD measurements This section covers the following Real Ear Measurement Audiometry topics Speechmap o ee Targets NAL NL1 15 2 RECD facts Insertion gain OF age Adah Manual control Oj Transducer Headphone f 15 3 RECD coupler response Threshold Se S UCL Enter ZO 15 4 RECD real ear response Gene 15 5 RECD results Average Cancel Continue FastFacts 15 1 RECD real ear to coupler difference 15 2 RECD facts Individual RECD values are derived by comparing the real ear SPL for a given test signal to the 2cc coupler SPL for the same test signal These RECD values are used to 1 convert HL threshold and UCL obtained using insert phones to SPL values 2 simulate real ear measurements from 2cc coupler measures S REM and 3 derive 2cc coupler targets from real ear aided targets If you use insert ear phones for audiometry OR if you verify using S REM you should measure RECD preferred or use age related average RECD If you use headphones or sound field for audiometry AND you use REM for verification RECD is not applied in any way and need not be measured If you use 2cc
146. urement Setup and 11 REM Screen Setup 1 Press lt Tests gt then highlight amp lt PICK gt Insertion gain from the REM tests list 2 Highlight and lt PICK gt Instrument to chose from BTE ITE ITC CIC Body This changes the CORFIG used for 2cc targets 3 Highlight and lt PICK gt fitting method to chose from FIG6 NAL NL1 NAL R POGO Il Berger Libby User None Insertion gain audioscan 1405 Max TM SPL 130 b GERA Instrument BTE R Format Graph Scale dB SPL 130 120 Audiometry S Transducer Insert Phones Aided REUR Auerage REAR 1 i Speech Intelligibility Index SII REAR Average Unaided REIG Stimulus Level Si REUR a OlPink noise 55 71 a 3 Ol REUR Pink noise 55 NAL RP ZO Fitting method Insertion Gain g Curve REIG 1 Unaided SII e SII for target REI Target REIG T i T 2000 FastFacts 16 2 Insertion gain in SPL 0611 RM500SL User s Guide Version 2 8 Page 64 0611 16 3 Insertion gain in HL See 10 Real Ear Measurement Setup and 11 REM Screen Setup 1 Press lt Tests gt then highlight amp lt PICK gt Insertion gain from the REM tests list 2 Highlight and lt PICK gt Instrument to chose from BTE ITE ITC CIC Body This changes the CORFIG used for 2cc targets 3 Highlight and lt PICK gt fitting method to chose from FIG6 NAL NL1 NAL R POGO II BERGER LIBBY USER NONE An estimated aided threshold curve
147. y then highlight and lt PICK gt 2000 Hz from the drop down list 4 Highlight then lt PICK gt Start test which changes to Stop test 5 Hold the probe module about 18 0 5 m in front of the REM speakers 6 Hold the microphone of a calibrated sound level meter next to the REM reference microphone as shown Set the sound level meter to C weighting and slow 7 The sound level meter should read 70 2 dB 8 Repeat with the frequency at 250 Hz 9 To stop the measurement highlight and lt PICK gt Stop test The probe module should be replaced if it fails this test FastFacts 10 4 Calibration check for probe module 0611 RM500SL User s Guide Version 2 8 Page 52 10 5 Max TM SPL setup The Max TM SPL safety feature allows you to set a limit on the SPL measured by the probe microphone above which a test terminates The MAX TM SPL limit is shown on all REM screens The default limit is 120 dB To choose a different Max TM SPL setting 1 Press lt Setup gt then highlight and lt PICK gt Max TM SPL 2 Highlight and lt PICK gt the current Max TM SPL setting 3 Highlight and lt PICK gt the desired Max TM SPL setting from the drop down list 4 Press lt Continue gt to exit Setup This Max TM SPL setting will be in effect until you change it If the limit is exceeded during a real ear test the RM500SL will terminate the test and display the message MAX TM SPL EXCEEDED You must then deci
148. y of America 97 3 1854 1684 0611 RM500SL User s Guide Version 2 8 Page 98 Cox R M amp Moore J N 1988 Composite speech spectrum for hearing aid gain prescriptions Journal of Speech and Hearing Research 31 102 107 Dunn H K amp White D S 1940 Statistical measurements on conversational speech Journal of the Acoustical Society of America 11 278 288 Feigin J A Kopun J G Stelmachowicz P G amp Gorga M P 1989 Probe tube microphone measures of ear canal sound pressure levels in infants and children Ear and Hearing 10 4 254 258 Fikret Pasa S amp Revit L J 1992 Three experiments to validate new probe measurement practices in prescribing customized hearing aids Journal of Soeech and Hearing Research 35 384 400 Hawkins D B Cooper W A amp Thompson D J 1990 Comparisons among SPLs in Real Ears 2cc and 6cc couplers Journal of the American Academy of Audiology 1 154 161 Hawkins D B Walden B E Montgomery A A amp Prosek R A 1987 Description and validation of an LDL procedure designed to select SSPL90 Ear and Hearing 8 162 169 Killion M C amp Monser E L 1980 Corfig Coupler response for flat insertion gain In G A Studebaker and Hochberg Eds Acoustical Factors Affecting Hearing Aid Performance Baltimore University Park Press Lewis D E Feigin J A Karasek A E amp Stelmachowicz P G 1991 Evaluation and assessment of FM system
149. z band analyzers N a 10 Log Analysis Bandwidth Hz 0 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 Band Center Frequency Hz Figure 4 Analysis bandwidths of some real ear analyzers and critical bands for a normal ear If the analysis bandwidth is less than a critical band aided response curves shown to be at threshold or UCL will actually be well above it Multicurve Dual view audioscan 120 P 110 100 90 80 70 60 Les Lei s Seet Lee t Less bai Kai Fest Gan La b s Sei Gee bes 250 500 1000 2000 4000 8000 500 1000 2000 4000 Dual view SO Test Stimulus Level Dual view ZO Test Stimulus Level Graph SO foll Swept 60 Graph 20 Aol Swept 60 Seale dB SPL O ZO Pink noise 60 Scale dB Gain O Zell Pink noise 60 3 0 Swept 60 Swept 60 NO TI A TI Curve Hide Show ce Curve Hide Show fe Figure 5 Output left and Gain right curves for a linear hearing aid generated using a swept tone 1 and pink noise analyzed in 1 12 octave bands 2 Dual view not available in RM500SL 07 05 06 Etymonic Design Incorporated 41 Byron Ave Dorchester ON Canada NOL 1G0 Page 5 USA 800 265 2093 519 268 3313 FAX 519 268 3256 www audioscan com REM Directional Single view audioscan Ww Presentation Single view ZO 1104 _ Format Graph 30 Scale dB SPL REAR Stimulus Level Spkr page 2 Of

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