SOUNDFIT™ Fitting Software User`s Manual
Contents
1. The forward path of the hearing aid is not affected and unlike adaptive notch filter approaches this does not reduce the hearing aid s gain The AFC is based on a time domain model of the feedback path and reduces the risk of experiencing feedback while wearing the hearing aid Increased detail in the feedback path model results in more accurate feedback estimation less residual feedback in the hearing aid signal and increased stable gain The internal feedback path model contains over 40 adjustable parameters This provides finer tuning for stable feedback paths and rapid adjustment for dynamic feedback situations The parameters of the internal feedback path model are updated at a rate of several thousand times per second Additionally it features rapid adjustment for dynamic feedback situations and resistance to tonal inputs When sustained feedback is detected the canceller will attack the feedback signal If a tonal input signal is detected the feedback canceller is disabled to prevent cancellation or distortion of the incoming tone This detection process occurs continuously automatically and rapidly whenever the feedback canceller is enabled Adjustments Check box to indicate that feedback canceller is to be activated Once itis activated the operation is completely automatic Changes in the feedback path are adaptively tracked and compensated No user adjustments or in situ calibration is required Ensure that the fit of the hearing aid2. 45 z Simulation No Device Connected Simulation No Device Connected 125 250 500 1k 2k 4k 8k 125 250 500 1k 2k 4k 8k o 1 20 40 60 80 100 120 Model Half Shell Model Full Shell Output 115 dB Output 115 dB Gain 60 dB Gain 45 dB 4 Channel 2 Channel WDRC WwDRC 32 kHz Low Cost Noise Reduction Adaptive Feedback Cancellation Figure 5 1 Device Selection screen Note Devices can be manually selected using the drop down boxes labelled Select Instrument Manual selection of the hearing aids forces the software to work in Simulation Mode for that ear GENNUM Proprietary and Confidential 32136 3 July 2006 10 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 5 2 Read Detect Instrument If you connect your hearing aids during the patient information window you should already be in programming mode Otherwise select Read to automatically search the interface box es to identify products connected Note You can specify which programmer to use to communicate with the hearing aid s by clicking the Tools menu item followed by Options This allows you to specify the default programmer to use or to return to Auto Select mode which searches through all of the installed programmers to find a connected hearing aid The default behaviour of SOUNDFIT is Auto Select 5 3 View Instrument Information O
3. Copy in the audiogram area Proprietary and Confidential 32136 3 July 2006 7 of 21 Ee GEN NUM SOUNDFIT Fitting Software User s Manual 4 1 1 Adding Sessions SOUNDFIT uses the term session to refer to each visit made by a patient or client Each time you Save a record of the visit it is stored as a session A single patient may have many sessions This functionality provides a means of recording the changes and progress made over time as well as allowing you to access previously saved information Every session has a date time stamp as well as a name You can name the session as you prefer For example Initial Visit Fitting 2 Reprogramming Fine Tuning and One Year Follow up etc A new session is automatically created when you select a patient or create a new patient This new session will not be saved to the database until Save is clicked Clicking Save also closes the current working session and any further edits will be applied to a new session If you do not name the session when you select Save your current work is automatically stored as a copy of the selected session eg Copy of Session 1 4 1 2 Creating a New Session To create a new session Click the copy Session located in the Tool bar to create a new session This new session still has all of the existing information but the ability to make changes as required is available Be sure to give each new session a name so that you can easily find the in
4. adjustable corner frequency above which the high cut is active Adjustments Lower the corner frequency to provide more cut to the high frequencies Reduce high frequencies when sounds are too tinny sharp or when there is feedback 8 2 3 Crossover Frequencies There are displayed as vertical red right or blue left lines on the graph On a two channel instrument they should be set between 1000Hz and 2000Hz to separate consonants from lower format vowels With a 4 channel instrument the crossover should be distributed over the speech signal components Adjustments Move the horizontal slider on the Response Tab another position for each of the crossover controls This can be used to help shape the frequency response 8 3 Graphic EG Tab 8 3 1 Graphic Equalizer VENTURE and DUET products have a multi band graphic equalizer These bands are spaced logarithmically and each one can provide gain adjustments in 1dB increments using the vertical sliders Adjustments Use these to refine the shaping of the frequency gain response curves GENNUM Proprietary and Confidential 32136 3 July 2006 18 of 21 EBENE GEN NUM SOUNDFIT Fitting Software User s Manual 8 4 Adaptive Tab 8 4 1 Feedback Canceller GENNUM Based on a phase cancellation method the Adaptive Feedback Canceller AFC reduces acoustic feedback by forming an estimate of the hearing aid feedback signal and then subtracting this estimate from the hearing aid input
5. document or for the use of the circuits or devices described herein The sale of the circuit or device described herein does not imply any patent license and Gennum makes no representation that the circuit or device is free from patent infringement GENNUM and the G logo are registered trademarks of Gennum Corporation Copyright 2004 Gennum Corporation All rights reserved Printed in Canada www gennum com GENNUM Proprietary and Confidential 32136 3 July 2006 21 of 21
6. is adequate and that there is no excess cerumen in the ear canal which may be the source of a fit problem Proprietary and Confidential 32136 3 July 2006 19 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 8 4 2 Noise Reduction The adaptive noise reduction algorithm is built upon a high resolution 128 band filter bank enabling precise removal of noise It monitors the signal and noise activities in these bands and imposes a carefully calculated attenuation gain independently in each of the 128 bands Below the kneepoint compression is 1 2 or 1 3 This reduces microphone and circuit noise and is of benefit to patients with normal hearing in the low frequencies Noise reduction is determined by a combination of three factors The SNR in each band determines the maximum amount of attenuation that will be applied to the band the poorer the SNR the greater the amount of attenuation Simultaneously in each band the masking threshold variations resulting from the energy in other adjacent bands is taken into account Finally the noise reduction gain is adjusted to take advantage of the natural masking of noisy bands by speech bands over time Based on this approach only enough attenuation is applied to bring the energy in each noisy band to just below the masking threshold This prevents excessive amounts of attenuation from being applied and thereby reduces unwanted artifacts Adjustments Move the horizontal sl
7. ota rrr s tea vate Evi te o Face Teu deg 19 8 4 1 Feedback Canceller iint iniret coru ti tron iiini 19 8 4 2 Noise Reduction eene eene entente rn tennte trennen 20 9 REVISION HISLOLY m 21 GENNUM Proprietary and Confidential 32136 3 July 2006 3 of 21 ENNN GENNUM 1 Basic Software Operation Overview SOUNDFIT is an easy to use hearing aid fitting software application SOUNDFIT s interface consists of three steps each serving a major task Patient Information Entry Create a record for a new patient Select an existing patient Record personal information about the patient such as name address etc Record the Audiogram s for the patient Hearing Aid Selection Simulate various hearing aid fittings for the hearing loss shown on the audiogram or Read and identify a hearing aid connected to the programming box Fitting Manually or automatically using Autofit configure the connected device to provide suitable gain for the hearing loss described in the audiogram GENNUM Proprietary and Confidential 32136 3 July 2006 4 of 21 H GEN NUM SOUNDFIT Fitting Software User s Manual 2 Installation To install SOUNDFIT 1 Run the installer If installing from CD insert the CD into your computer to launch the installer If you download SOUNDFIT double click the file that you downloaded to launch the installer 2 Specify a destination directory when prompted You
8. soft sounds lower number if the patient is having trouble hearing soft voices or from a distance Reduce the gain for high frequency soft sounds higher number if the aid is feeding back Reduce the gain for soft sounds higher number if a previous linear user is having difficulty adjusting to the amount of compression from a WDRC circuit Reduce the gain for soft sounds higher number if the hearing aid cuts out when the patient speaks It could be that the kneepoint is low enough that the patient s own voice is triggering compression 8 1 2 Compression Ratio Determines how much the signal will be compressed once the incoming signal is loud enough to cause compression to occur after the lower threshold value This helps to restore non linearity and dynamic range normally 95dB range Offers relatively distortion free listening under saturated conditions and reduces the need for user adjustment of the volume control Adjustments High compression ratios are typical for patients with a narrow dynamic range while low compression ratios are typical for large dynamic ranges The required compression ratio normal dynamic range eg 95 impaired dynamic range eg 55 1 17 GENNUM Proprietary and Confidential 32136 3 July 2006 16 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 8 1 3 Gain Vertical slider that allows a change to the overall gain setting The top position corresponds to the maximum gain sett
9. 6 Fitting Step 3 si c dha eee 12 6 1 Read From the Device nennen cte rente nip dete ded eden c n daa 12 6 2 View Settings 1 and 2 Buttons sse enn 12 dE 13 6 4 Manual AdjUsttments 5 5 i cnr errare seat dta beue ca ce sep aue euet reae edax dea 13 6 5 Reset the Device reconstruire deter con Fete Fete So cesta loda de rne debates 13 6 0 ANSIIMOGG emiren tentes Es a LEER IRE c RERUM LM RE e LET tC IAS Nc LEERS 13 6 7 Program the Device sssssssee nne 14 NI C tee 14 Me BUMOMS te ccd E 15 8 Appendix SOUNDFIT Quick Reference Guide sene 16 NM ONE 16 8 11 Lower Threshold uci circiter erect Dec eli eee oth 16 8 1 2 Compression Ratio ens isis cece ceci eet ter aa Ene ERE 16 8 1 9 Gain iure e etant tr EE aD Lane 17 BV AGC m 17 8 2 RESPONSE TAD m M 17 8 2 V LOW CUT ccm 17 8 2 2 MOMO Utes n A D LEO UL LIE EET 18 8 2 3 Crossover Frequencies ssssssseeeeneneen eene 18 GENNUM Proprietary and Confidential 32136 3 July 2006 2 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 8 3 Graphic EQ Tab 1 e RETE ne deepens eee 18 8 3 1 Graphic Equalizer esses enne nnns 18 8 4 Adaptive Tab rrt ree ett
10. 8 Target 40dB 65dB 9008 Response vos Response ID Response EON Response I e 250 500 1k 2k 4k 250 500 1k 2k 4k View Settings 1 View Settings 2 View Settings 1 View Settings 2 VO Response Graphie Edi Adaptive VO Aep CR1 5 Max Lower Threshold Compression Ratio Chameli M gt WA 531 4 Gan AGCO i 3 Channel 2 48 t2 40 1 p e T i Channel 3 46 4 01 gt VA i i Channel 459 v 401 i Threshold 42 Mi Crossover 1800 mam Figure 6 1 Fitting screen 6 1 Read From the Device Click Read to set the on screen controls to the actual settings currently stored in all memories within all connected devices 6 2 View Settings 1 and 2 Buttons These buttons provide temporary storage area where two sets of parameters for each ear can be manipulated Selecting the appropriate View Settings button for each ear will make these settings active These settings are initially set to the values read from the device upon entering this step Click Program to burn the active settings to the device and Save to store the active settings to the database GENNUM Proprietary and Confidential 32136 3 July 2006 12 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 6 3 Autofit Click Autofit to automatically adjust the device controls for the currently displ
11. Exit in the file pull down menu to quit the application GENNUM Proprietary and Confidential 32136 3 July 2006 6 of 21 ENNN GENNUM 4 Patient Data Entry Step 1 NEUEN MENU File Tools Help g p Step 1 of 3 Patient Information and Audiogram e z 9 e J i Nest Notes SOUNDFIT Last Name First Name MI Home Phone Smith Mary s 655 123 4567 Select Patient Address Other Phone 222 Somewhere Street New Patient City Prov Postal Code Account Number Townville SK fate 203 1 Delete Session Session Date Session Name 06 06 2006 12 42 06 pm x Initial Visit Right Copy Frequency Hz UCL 0 1k 2k 4k 8k Figure 4 1 Patient data entry screen 4 1 Entering Patient Information and Audiogram GENNUM You may add or change SOUNDFIT patient information by typing the information into the fields provided Enter audiometric thresholds by clicking your mouse at the intensity and frequency on the graph area Thresholds for the right ear appear in red while thresholds for the left ear appear in blue Note fno thresholds are entered for 125Hz or 8000Hz SOUNDFIT will assume a value of OdB Unmasked bone conduction BC can be entered for reference but are not used by the Autofit routine You can copy the audiogram from the right ear to the left by clicking
12. GENNUM SOUNDFIT Fitting Software User s Manual Information Note GENNUM Proprietary and Confidential 32136 3 July 2006 1 of 21 HE GEN NUM SOUNDFIT Fitting Software User s Manual Contents 1 Basic Software Operation Overview essem 4 VICE m 5 2 1 Minimum System Requirements sess ee 5 3 Existing Patient Selection ccce eeeeeee nennen nennt nnne ietis tenenti nnns 6 3 1 To Create a New Patient File sesesee nn 6 3 2 To Search for an Existing Patient 6 3 3 To Quit SOUNDFIT siachii adele nine eeepc ee 6 4 Patient Data Entry Step 1 ic perite a a DUE Less Eden 7 4 1 Entering Patient Information and Audiogram eee 7 4 1 1 Adding SESSIONS ite een det i Peso iEn 8 4 1 2 Creating a New Session sssssssee emen 8 4 1 3 Transferring a Previous Program to a New Hearing Aid 8 4 1 4 Viewing Previous Sessions sssee emen 9 4 1 5 Deleting Ee IIo 9 4 1 6 Proceed to the Device Selection Step sseeeeess 9 5 Device Selection Step 2 nennen nnn nens 10 5 1 Select Instrument iii oe iiiv ete tei er ntc aer ede M ERR Ra Ue cuu 10 5 2 Read Detect Instrument sse 11 5 3 View Instrument Information seeeeeen eem 11 5 4 Proceed to the Fitting Screen Step ssssee em 11
13. ayed memory of both ears if applicable to best match the target curve for the patient s hearing loss If the hearing aid has more than one memory you must select each memory and AutoFit it individually If you want to AutoFit one ear while you have two hearing aids connected then click View Settings 2 for the ear with no changes AutoFit maintains the second setting temporary memory storage Click View Settings 1 to return the Hearing Aid to the user settings then click Program and Save 6 4 Manual Adjustments The controls may be manually adjusted to allow fine tuning beyond the abilities of the Autofit routine or you can do the full fitting by hand Adjusting the Graphic EQ parameters with DUET or VENTURE based products may either be performed on the Graphic EQ tab or by dragging the green dots shown on the graph Please see the Appendix for manual adjustments 6 5 Reset the Device If you want to return a hearing aid to its default settings Factory built in Hearing Aid settings click the menu item Tools followed by Restore LEFT Default Settings or Restore RIGHT Default Settings depending on the side that you would like to reset This feature will set the SOUNDFIT parameters back to the product default values for the currently selected memory for the selected ear 6 6 ANSI Mode Click Tools from this screen to provide an option to place the device into it s ANSI test state if the ANSI definition files appropriate for
14. d session from the database Click Delete Session If all sessions have been deleted clicking Delete Session one more time gives you the option to delete the patient from the database 4 1 6 Proceed to the Device Selection Step Click Next GENNUM Proprietary and Confidential 32136 3 July 2006 9 of 21 ENNN GENNUM 5 Device Selection Step 2 This step identifies the hearing aids connected to the programmer and or allows you to select a model for simulation Upon entering this step from the Patient Information window the software attempts to discover which instruments are currently connected to the programmer If the software detects that the device s which are currently connected do not match those recorded in the currently selected session a dialog box will be displayed providing an option to correct the difference Retry or use the currently connected devices or maintain the selections in the database If the selected devices do not match the connected devices the software will operate in Simulation mode and no communication with the hearing aids will be permitted 5 1 Select Instrument Select the product from the drop down list SOUNDFIT 2 4 0 Smith Mary 07 07 2006 05 37 34 pm Initial Visit File Tools Help Step 2 of 3 Device Selection e ejarje Ofa S HR Previous Next Save Undo Notes Print Read j SOUNDFI T i 5 Coi Select Instrument py Select Instrument GA3219 4CH 32 kHz 115 60 z Foundation 2CH WDRC 115
15. e Support select Help and then About SOUNDFIT Table 6 1 Response Curve Colour Scheme Red 40 dB Blue 65 dB Green 90 dB GENNUM Proprietary and Confidential 32136 3 July 2006 14 of 21 BEEN GEN NUM SOUNDFIT Fitting Software User s Manual 7 Buttons Previous Return to the previous step Next Proceed to the next step C Save Save any changes to the current session E Undo Revert to the last saved condition 8 Copy Session Create a new session with this patient Copy Copy Information from the Right side to the Left side Mute Turns off all output from the hearing aid f Autofit Automatically adjusts the aid to suit the hearing loss Read Read all settings currently stored in the hearing aid s B Program Program the current settings into the hearing aid s Notes Enter general notes for the current patient Print Print a summary sheet for the selected patient GENNUM Proprietary and Confidential 32136 3 July 2006 15 of 21 E Gennum 8 Appendix SOUNDFIT Quick Reference Guide 8 1 1 0 Tab 8 1 1 Lower Threshold Use this to adjust the gain for soft sounds in CH1 CH4 The lower the number the more gain for soft sounds A higher number will be more linear and give the least amount of gain for soft sounds Adjustments Reduce the gain for soft sounds higher number when the patient hears people better from further away than from up close Increase the gain for
16. formation that you need later You must either Save or Undo any changes before starting a new session Selecting Undo removes all changes from the last time you selected Save 4 1 3 Transferring a Previous Program to a New Hearing Aid If you are replacing a lost or damaged hearing aid with a similar circuit To detect the device connect the new hearing aid to the programmer 1 Click Session from the Patient Information window 2 Select the date you want to retrieve information from and then click Next 3 Type a new session name for today s work and then click OK 4 Click Next to display target curve and instruments used in the selected session 5 Select Work with Settings Stored in Database differ from those read in the check box 6 Click OK which displays the settings you want to transfer into the new hearing aid 7T Click Program and then Save 8 Click Save to retain information in this session GENNUM Proprietary and Confidential 32136 3 July 2006 8 of 21 EBENE GEN NUM SOUNDFIT Fitting Software User s Manual 4 1 4 Viewing Previous Sessions A previous session can be viewed but not edited To view a previous session click the Session Date box and select the session that you would like to view If you wish to use this session as a starting point for a new session click Session or Next from the tool bar Then a prompt asks you for a new session name 4 1 5 Deleting Sessions To delete the currently selecte
17. ider to reduce the perceived noise by up to 12dB GENNUM Proprietary and Confidential 32136 3 July 2006 20 of 21 EBENE GEN NUM SOUNDFIT Fitting Software User s Manual 9 Revision History Version ECR Date Changes and or Modifications 0 134053 June 2004 New document 1 135909 February 2005 Updates 2 140371 June 2006 Updates reflecting 2 3 0 software release 3 141348 July 2006 Adjust software release number DOCUMENT IDENTIFICATION INFORMATION NOTE Information relating to this product and the application or design described herein is believed to be reliable however such information is provided as a guide only and Gennum assumes no liability for any errors in this document or for the application or design described herein Gennum reserves the right to make changes to the product or this document at any time without notice GENNUM CORPORATION Mailing Address P O Box 489 Stn A Burlington Ontario Canada L7R 3Y3 Shipping Address 970 Fraser Drive Burlington Ontario Canada L7L 5P5 Tel 1 905 632 2996 Fax 1 905 632 5946 GENNUM JAPAN CORPORATION Shinjuku Green Tower Building 27F 6 14 1 Nishi Shinjuku Shinjuku ku Tokyo 160 0023 Japan Tel 81 03 3349 5501 Fax 81 03 3349 5505 GENNUM UK LIMITED 25 Long Garden Walk Farnham Surrey England GU9 7HX Tel 44 0 1252 747 000 Fax 44 0 1252 726 523 Gennum Corporation assumes no liability for any errors or omissions in this
18. ing of the aid and the bottom position corresponds to the minimum gain setting Adjustments When the hearing aid has a volume control gain should be set so that there is reserve gain left on the volume control Typically gain would be programmed so that the patient could use the hearing aid with the volume control set to either 72 74 max so there is reserve gain left in the instrument 8 1 4 AGCo This vertical slider allows changes in the level of output for very loud sounds It is designed to prevent the hearing aid from saturating and provides protection from the loud sounds This should be usually set at a few dB below the patient s upper limit of comfort Adjustments Reduce the AGCo to decrease the gain for loud sounds 8 2 Response Tab 8 2 1 Low Gut This is an adjustable corner frequency below which the low cut is active Adjustments Raise the corner frequency to provide more cut to the low frequencies Reduce low frequencies when the patient s own voice is too loud hollow or muffled traffic noise or air conditioners and fans are too loud clarity is poor or there is too much base Increase low frequencies when soft voices are difficult to hear or when voices sound tinny or sharp and if the patient if having trouble getting adequate gain before feedback GENNUM Proprietary and Confidential 32136 3 July 2006 17 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 8 2 2 High Cut This is an
19. may accept the default or change to your desired location The installation places an icon in the programs area of the Start menu as well as on your desktop 2 1 Minimum System Requirements To run SOUNDFIT you must have the following computer and interface capability A Pentium class computer Video resolution of 800x600 or greater Minimum 256 Colour Video Adapter Windows 95 or more recent A programming device such as the Gennum USB Programmer The software interfaces to Gennum s VENTURE FOUNDATION or DUET based hearing aids GENNUM Proprietary and Confidential 32136 3 July 2006 5 of 21 EN sEm 3 Existing Patient Selection The Patient Select search screen lists the patients and allows to choose the patient of your choice Select Search By Last Name or First Name or Home Phone or Account Number m ON D Mary 555 123 4567 Figure 3 1 Patient Selection Search screen 3 1 To Create a New Patient File Click New Patient 3 2 To Search for an Existing Patient 1 Type in the patient s first name last name phone number or account number 2 Click Find To select a patient whose information is already displayed on the screen e g Mary Smith in the example above either 1 Click on the patient s name then click Select or 2 Double click on the patient s name e g Smith 3 Click Cancel to go to the Patient Information Entry screen 3 3 To Quit SOUNDFIT Click
20. n the Device Selection screen below the selected instrument you see a sample photo of the selected instrument Beside the sample photo of the device there is a display of the recommended fitting range of the selected device If the audiogram curve rests within the shaded area the device is suitable for the patient s hearing loss Below the graph and photo of the device the selected instrument s Model name Output Gain and a short product description are displayed 5 4 Proceed to the Fitting Screen Step Once the device s have been selected click Next to begin the fitting process GENNUM Proprietary and Confidential 32136 3 July 2006 11 of 21 ENNN GENNUM 6 Fitting Step 3 The fitting screen provides the necessary tools to fit the hearing aid to the patient s hearing loss The fitting can be done manually or automatically Upon entering this step the software reads the current settings from the connected device s If the data that is read from the hearing aids does not match the data that was stored during the selected session if applicable a dialog box appears to allow you to choose which data to initially display SOUNDFIT 2 4 0 Smith Mary 0770772006 05 37 34 pm Initial Visit File Tools Help e oje Ereviousj N Save Undo Notes Print Right MemoyA gt A GA3219 4CH 32 kHz 115 60 Left Mema emo A PARE 2CH wDRC 115 45 Simulation No Device Connected Simulation No Device Connected Target 40dB 65d8 904
21. the connected device s has been provided by the hearing aid manufacturer Click Cancel to return to the main fitting window without making any changes to the hearing aid e Click ANSI from the dialog box to place the hearing aid into it s ANSI test state Click OK to reset the hearing aid to the state that it was in immediately before starting the ANSI test and return to the main fitting window GENNUM Proprietary and Confidential 32136 3 July 2006 13 of 21 EE GEN NUM SOUNDFIT Fitting Software User s Manual 6 7 Program the Device Click Program to Save the current memory in the hearing aid using the settings specified by the on screen controls This stores any settings you have changed into long term memory By default clicking Program applies the changes to the currently selected memory If you wish to program all memories at once click the Tools menu item then click Options This presents a check box to allow you to program all memories at once 6 8 Notes The Fig6 algorithm generates the target curves Fig6 is a computer based approach to fitting a non linear hearing aids that have wide dynamic range compression WDRC For more information please see The Hearing Review November December 1995 Vol 2 No 10 Pages 28 and 30 For the response curve colour schemes see Table 6 1 below To access the user manual click Help then select SOUNDFIT Help from anywhere in SOUNDFIT To access information for Gennum Softwar
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