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Grason-Stadler GSI 61 Manual Rev B

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1. 1761 9621 Stereo Tape Cassette 1761 9622 Speakers Basic 90 dB with cables 125 16 KHz 1761 9630 Speakers High Performance 96 dB with cables 125 8 1761 9635 Booster Amplifier 220 240V with cables for use with the High Performance Speakers only 1761 9636 Booster Amplifier 100 120V with cables for use with the High Performance Speakers only 1761 9637 1761 0100 Rev B Sound Field System High Performance 102 dB 220 240V 125 8 kHz includes High Performance Speakers and Booster Amp 1761 9638 Sound Field System High Performance 102 dB 100 120V 125 8 kHz includes High Performance Speakers and Booster Amp 1761 9639 Paired Insert Phones E A RTONE 1700 9606 E A RTONE Replacement Foam Eartips Std 1700 9604 E A RTONE Replacement Foam Eartips Small 1700 9605 single Insert Phone 470 1700 9609 High Frequency Headphones w booth cables 1761 9602
2. ii Warranty iv Specifications V Standards V Pure Tone Channel 1 and Channel 2 V Speech Channel 1 and Channel 2 vi Signal Format vi Special Test Capabilities vi Communications and Monitoring vi Dimensions Weight vi Power Consumption vii Accessories Supplied vii Optional Accessories vii Catalog Listings viii Electromagnetic Compatibility
3. 6 5 Cable Connections 6 5 Data Transfer 6 6 Record and Field Formatting 6 6 Checksum 6 6 Remote Input Operation 6 7 Input Record 6 7 Input Record Type to 4 6 7 Input Record Type 5 Pushbutton Code Record 6 7 Type 6 Set Test Frequency Record 6 11 7 Set HL Record 6 12 Remote Output Operation 6 13 Type 1 GSI 16 Compatible Short Data 6 13 4 Error Record 6 16 5 GSI 61 Short Data Record 6
4. Introduction 1 1 External Inspection 2 1 Unpacking 2 1 Accessories Supplied 2 1 Connectors Controls and Indicators 2 2 1 2 2 Left Side 2 4 Right Side Panel 2 4 Front Panel Controls 2 5 Valid Stimuli Combinations 2 8 Valid Transducer Combinations 2 8 Displays 2 14 Test Microphone Monitor Headset 2 17 Optional Accessories 2 18 H
5. Test Frequency Decrement Frequency Increment Frequency Reserved for GSI 10 Channel 1 Tone Bar 0 Ai Channel 2 Tone Bar 0 SS DO Channel 1 Intensity Control Decrease 1 step Increase 1 step DO 0 Channel 2 Intensity Control Decrease 1 step Increase 1 step NO NO oo 0 Channel 2 Interrupt 0 Reserved for GSI 10 Remote Output 0 Normal mode Initiates Request a data record transfer of the current type selected on the remote dip switches Channel 1 Interrupt 23 4 2 Je HL Calibration Mode Stores the calibration data into EEPROM modes Initiates a data record transfer of the current test type selected on the remote dip switches Pulsed 0 pes 0 1 2 5151 0 DO ON 0 Ch 1 Phone Ch 1 Bone Transducer Type 1761 0100 Rev B 6 9 Grason Stadler GSI 61 CLINICAL AUDIOMETER Function Function Group Function Code Subgroup 29 continued Transducer Type Routing SISI HL Control Step Size DO Monitor Speaker 0 45 1 99 Calibration Mode 0 Scorer Timer Talk Forward Talk Forward Level Oscillator Control P Screen Display gt M P DO Uo Uo Oo Uo Oo Uo I 69 P OO Sub Code Pushbu
6. 1761 0100 Rev B 6 23 Grason Stadler GSI 61 CLINICAL AUDIOMETER Output Record Type 8 Unit Configuration Record 6 24 Contains the information on Dip Switch configuration selections This record is not GSI 16 compatible Character Number of Field Name Field Description Offset Characters 2 1 NBN Offset 0 Custom Narrow Band Noise offsets in use 1 Standard Narrow Band Noise offsets in use 3 1 WN Offsets 0 Custom White Noise offsets in use 1 Standard White Noise offsets in use 4 1 Insert Phone 0 Paired EARTone 1 single insert phone in use 5 1 Speaker Type 0 Basic 1 High Performance 1 Booster Amp 0 Not in use 1 Booster Amp in use 7 1 Bone Vibrator 0 Forehead Calibration 1 Mastoid 1 Speech Filter 0 Not in use 1 Speech filter on use Language 0 English 1 French 2 German 3 Italian 4 Spanish High Frequency 0 Other Phone Type 1 Sennheiser Phone Coupler 0 NBS 9A 1 318 Insert Phone 0 126 HAI HA2 Coupler Type qe Speaker Azimuth 0 0 degrees Calibration 45 degrees High Frequency 0 installed 1 Not installed 0 Custom Calibration 1 Standard Record Terminator CR LP 1761 0100 Rev B 1 Airplane 10 rt
7. or the High Frequency ranges 8 kHz to 20 kHz and the instrument status are displayed Hold the Display Status key for 2 5 seconds to view the left audiogram on the left side and right on the right side Hold the Display Status key again to reverse back to the original setting 1761 0100 Rev B 1761 0100 Chapter 2 Installation Display Audiogram High Frequency When the High Frequency pushbutton is pressed with the High Frequency option installed the system allows tone testing in the extended range from 8 kHz to 20 kHz The display remains in the Display Status or Display Audiogram format as previously selected If the High Frequency option has not been installed the pushbutton 15 pressed the error message Not Available appears in the error message area of the display Display High Frequency 2 11 Grason Stadler GSI 61 CLINICAL AUDIOMETER Print Audiogram If the printer option is available and the Print Audiogram pushbutton is pressed the current saved test information in audiogram format is sent to the printer If there is no data stored in the GSI 61 memory and the Print Audiogram pushbutton is pressed the message No Test Data Stored appears in the error message area If the printer option is not active and the pushbutton is pressed the message Not Available appears Remote When the Remote RS232 or USB option is installed pressing the Remote pushbutton allows the GSI 61 when conn
8. If the dB HL limit is reached in Channel 2 before Channel 1 the Channel 2 dB HL display will temporarily flash and remain at this level Tracking remains on When the Channel 1 dB returns to a level at which the selected difference between the two channels can resume Channel 2 again tracks Channel 1 Tracking is in the off state upon initialization of any test type When tracking is selected it is possible to manually change the intensity of Channel 2 to alter the dB difference between the two channels without deselecting Tracking To exit Tracking press the button again When Tracking is active a message is displayed on the LCD These pushbuttons allow the choice of twelve standard audiometric frequencies 125 Hz 250 Hz 500 Hz 750 Hz 1000 Hz 1500 Hz 2000 Hz 3000 Hz 4000 Hz 6000 Hz 8000 Hz and 12000 Hz If the high frequency option is activated these pushbuttons allow a choice of nine high frequencies 8 kHz 9 kHz 10 kHz 11 2 kHz 12 5 kHz 14 kHz 16 kHz 18 kHz and 20 KHz Each press of the right R pushbutton selects the next higher frequency Each press of the left L pushbutton selects the next lower frequency The new frequency 15 selected when the pushbutton is released When at the lower limit of the frequency selection pressing the L pushbutton will cause the display to roll over to the highest frequency limit and vice versa If a transducer with a narrower range is selected only valid frequencies for that transducer
9. Threshold Test Ear Pure Tone Test 125 Hz Bone Conduction Threshold Masking Ear Pure Tone Test 125 Hz Sound Field Pure Tone Test Pure Tone Test Pure Tone Test 1 kHz Pure Tone Test 1 5 kHz Pure Tone Test 2 kHz Pure Tone Test 3 kHz Pure Tone Test Pure Tone Test 8 kHz High Freq 20 to 120 NR 260 to 540 NT 32768 0x8000 20 to 120 dB x 2 NR 260 to 540 NT 32768 0x8000 20 to 120 dB x 2 NR 260 to 540 NT 32768 0x8000 See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields 262 20 Pure Tone Test See Pure Tone Test 9 kHz 125 Hz fields EAE Pure Tone Test 10 kHz Pure Tone Test 11 2 kHz See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields 6 19 Grason Stadler GSI 61 CLINICAL AUDIOMETER Character Number of Data Type Field Name Field Description Offset Characters Speech Test SISI Test 6 20 Pure Tone Test 12 5 kHz Pure Tone Test 14 kHz Bone Vibrator Calibration Speech Test Test Ear Threshold Speech Test Masking Ear Threshold Speech Test Masking Type Speech Test Number Presented Speech Te
10. are available See the Table entitled dB HL Limits per Frequency and Transducer in the Hearing Limits and Frequency Levels Section pages 2 24 and 2 25 for the allowable frequency ranges of the specific transducers Pressing this pushbutton allows the operator to speak directly to the patient through the microphone at the level set by the Talk Forward control by interrupting the stimulus presentation Talk Forward can be used with any available transducer including the optional High Frequency earphones While Talk Forward is on the only control which can be activated 1s the Print if available The GSI 61 resumes the test status held prior to pressing the Talk Forward pushbutton when the pushbutton is released 2 0 Grason Stadler GSI 61 CLINICAL AUDIOMETER Scorer Timer CORRECT CLEAR INCORRECT START CLEAR STOP Displays DISPLAY STATUS DISPLAY J AUDIOGRAM HIGH The Correct Clear and Incorrect pushbuttons are used for scoring results in Speech ALTernate SISI tests The scorer is displayed in the test status area of the Status screen When Speech SISI or ALT is selected the scorer initializes to 0 0 0 The operator presses the Correct or Incorrect pushbutton after each presentation depending on the response The display indicates the number of correct responses and the total number of presentations along with the percentage of those correctly identified The display clears with the pressing of the Clear pus
11. contralateral interference when a speech signal is delivered to the ear with the greater loss The difference in SRT between the ears should be at least 20 to 25 dB 1 Follow the procedure described above Pure Tone Stenger using Speech stimuli 2 Spondees are presented simultaneously by live voice or recorded speech at a level 10 dB above the better ear threshold and 10 dB below the threshold for the poorer ear 3 Theminimum contralateral interference is determined in the same manner previously described using spondees 4 The minimum contralateral interference is the lowest intensity level in the poorer ear at which the patient stops repeating 2 or more spondees correctly 4 12 1761 0100 Rev B 5 Routine Maintenance Biological Calibration Check The microprocessor based circuit design of the GSI 61 Clinical Audiometer should provide trouble free service for a long time period It is recommended to routinely make and file the audiogram of one person for the purpose of biologic calibration This person or group of persons should have a known stable audiometric curve that does not exceed 25 dB HL at any frequency This procedure should start when the GSI 61 is first installed and then be continued Remember that individual threshold can shift by as much as 5 dB from day to day however variations that exceed this range may point to difficulties which require attention Periodic Checks The routine maintenance c
12. the frequencies available for testing are 8 kHz 9 kHz 10 kHz 11 2 kHz 12 5 kHz 14 kHz 16 kHz 18 kHz and 20 kHz The intensity range is from 20 dB to 110 dB HL High Frequency audiometry can also be performed in Sound Field using the Basic Speakers configuration In High Frequency Sound Field the frequencies of 8 kHz 9 kHz 10 kHz 11 2 kHz 12 5 kHz 14 kHz 16 kHz are available High Frequency TDH 50 Low Frequency Phones Sennheiser High Freq Phones TDH 50 Low Frequency Phones Sennheiser High Freq High Frequency Option Setup With Sound Booth 1761 0100 Rev B 2 23 Grason Stadler GSI 61 CLINICAL AUDIOMETER Hearing Level and Frequency Limits 2 24 Hearing Level dB HL It is not possible to select a dB HL value outside the limits for a particular transducer frequency combination An attempt to change or select a hearing level control that is outside of the limit will result in the following 1 The dB HL will stop at the limit value or 2 The dB HL will go to the nearest allowable level In either case the dB HL display will flash momentarily and then the test channel value will be replaced with NR No Response If an audiogram is displayed and the limits for a frequency transducer are reached the symbol for no response is displayed in the audiogram When Speaker is selected on both channels and the optional booster amplifier is not installed it 1s possible to increase Channel 2 to a higher
13. unmasked Sound field aided or unaided 1761 0100 Rev B Chapter 2 Installation The selection of any stimulus will deselect a previously selected stimulus on the opposite channel if the stimuli are not compatible Test Microphone Monitor Headset 1761 0100 Rev B The lightweight test microphone monitor headset supplied with the GSI 61 provides the operator complete comfort and utility standard microphone is positioned at the end of the adjustable boom The microphone boom rotates 225 degrees so that the microphone may be worn on either the right or left side of the head j fy orgor r Place headset on head by spreading headband slightly Then 1 receiver directly on the ear and slide the headband to adjust the fit The microphone must be positioned close to the tester s mouth so that the filter is almost in contact with the lower lip The white dot on the base of the microphone must face the tester s mouth The GSI 61 permits the operator to speak through the test microphone into the test transducer at continuously variable intensities from 45 dB HL to 90 dB HL in the Talk Forward mode The tester s lips maintain a constant distance from the microphone enabling the VU meter to uniformly average at 0 dB for live voice testing A lapel clip and a 10 foot coiled cord with a quick disconnect are included The telephone jack connector attaches the test microphone
14. 0 97 0 83 5 79 0 77 5 77 5 79 0 81 5 82 0 86 0 85 5 82 5 90 0 Frequency IEC 303 IEC 318 nterpolated Note The 125 Hz through 8000 Hz values are based on ANSI S3 6 1989 and ISO 389 1991 Standards Reference Levels for Pure Tones with Tone Earphones SPL values with the EAR Tone Earphones for 70 dB HL setting Frequency 125 250 500 750 1000 1500 2000 3000 4000 6000 8000 Speech IEC 126 96 0 84 0 75 5 72 0 70 0 72 0 73 0 73 5 75 5 72 0 70 0 82 5 IEC 711 98 0 87 5 79 5 76 0 75 5 79 5 81 5 83 0 85 0 86 0 85 5 88 0 Note 125 Hz through 8000 Hz values are based on ISO 389 Amendment 1 Effective Masking Values for Pure Tones ISO 8797 Narrow band noise SPL value 70 dB HL setting Frequency 125 250 500 750 1000 1500 2000 3000 4000 6000 8000 12000 Speech Noise IEC 303 121 5 100 5 87 5 83 5 383 5 835 87 0 85 5 585 5 88 5 88 0 92 5 90 0 IEC 318 119 0 99 0 87 5 84 0 83 5 835 85 0 87 5 870 91 0 90 5 87 5 nterpolated Note For narrow band noise the level control is calibrated in dB of effective masking The SPL in each one third octave band centered at each frequency is calibrated to a level 3 dB above the standard reference level for this frequency 5 3 Grason Stadler GSI 61 CLINICAL AUDIOMETER 5 4 Frequency Radioear B71 with 67 0 58 0 48 5 42 5 365 31 0 30 0 35 5 40 0 40 0 55 0 Bandwidths for Narrow Band Masking Sounds Pass Band Upper and Lower Frequency Limits at 3 dB Points Lower L
15. 15 Grason Stadler GSI 61 CLINICAL AUDIOMETER Error Record Codes Output Record Type 5 GSI 61 Short Data Record Error Description Invalid ASCII character in an input record Invalid number of characters in an input record Invalid input record type Invalid input record function code Invalid input record function sub code Reserved Invalid Set Frequency record Frequency value Invalid Set HL record HL value Invalid machine conditions for GSI 61 compatible data Generic NACK in response to an invalid input record Invalid Start of Record when receiving unexpected characters Overrun of GSI 61 UART Invalid combination of Basic Speakers and Booster Amp Invalid HL requested HL cannot be provided due to attenuator limits HL set to closest possible value Printing was aborted by keypad Printing was unsuccessful due to communications or printer problem Contains the current state of all instrument parameters including the expanded frequency and HL ranges of the GSI61 This record is not GSI 16 compatible Character Number of Field Name Field Description Offset Characters 2 1 Test 0 Tone test 1 Speech test 42 SISI test 3 Alternate test 3 1 Ch 1 Stimulus 1 Tone 2 NB Noise 3 White Noise 4 Speech Noise 5 Mic 6 Ext A T Ext B 5 1 SISI 0 None Off Reserved for GSI 10 27 On with 1 dB step size 3 On
16. 16 6 Test Battery Data Record 6 18 Record Prefix 6 18 Left Ear Test Data Pure Tone 6 18 Speech Test 6 20 SISI Test 6 20 Alternate 6 22 Right Ear Test Data 6 23 Record Terminator 6 23 7 Instrument Type 6 23 Remote Output Operation continued 6 24 Type 8 Unit Configuration Record 6 24 Test Words Al 1 Appendix Part 1 1 Part TWO Al 1 Bibliog r
17. Bibliography American National Standards Specifications for Audiometers ANSI Standard S3 6 1989 American National Standards Specifications for Calibration of Pure Tone Bone Conduction Audiometers ANSI Standard S3 43 1992 Acoustics Standard Reference Zero for Calibration of Pure Tone Audiometers ISO Standard 389 1975 Audiometers International Electrochemical Commission IEC 645 1992 1993 Criteria for Permissible Ambient Noise During Audiometric Testing ANSI Standard 53 1 1977 Dempsey James J 6000 Hz as an Early Indicator of Noise Induced Hearing Loss Ear and Hearing Vol 6 No 3 1985 pp 159 160 Dirks Donald D et al Bone Conduction Calibration Current Status Journal of Speech and Hearing Disorders XLIV May 1979 pp 143 155 Dreschler W A et al Role of High Frequency Audiometry in Early Detection of Ototoxicity Audiology 1989 28 4 211 20 Frank T High Frequency Hearing Thresholds in Young Adults Using a Commercially Available Audiometer Ear and Hearing Vol 11 No 6 1990 pp 450 454 Grimes Charles T Audiologic Evaluation in Infancy and Childhood Pediatric Annals 14 3 March 1985 pp 211 219 Guidelines for Pure Tone Threshold Audiometry ASHA19 1989 Katz Jack Handbook for Clinical Audiometry 3rd Edition Baltimore Williams and Wilkins 1985 Laurell G and Jungnelius U High Dose Cisplatin Treatment Hearing Loss and Plasma Con
18. Channel 2 Hearing Level control 1761 0100 Rev B 5 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER 5 2 Distortion and Frequency Shift This check be made by listening to the GSI 6176 output through the earphones and pressing all frequencies in the 125 Hz to 12000 Hz range at a loud but not uncomfortable level 70 to 80 dB HL for normal ears Listen also to ensure that the signal frequencies change appropriately when the Frequency L and pushbuttons are operated If distortion is heard in one earphone but not the other the chances are high that the earphones are at fault and should be replaced In any case the audiometer should be scheduled for immediate maintenance Speech Level Check To check the speech level with recorded speech select Ext A Channel 1 and ensure an external CD player is plugged into the GSI 61 Place the earphones on a person with normal hearing Less than 25 dB Present a word list from the CD player at 40 dB If intelligible speech is not heard with the Channel 1 Hearing Level control set at 40 dB or less the audiometer or the external device should be scheduled for technical service To double check a possible problem with the audiometer check the speech level with live voice through the Mic Internal Controls Check Should the front panel controls lock into one state and it 1s not possible to change any of the parameters turn off the power Wait one minute and then power on Bone Vibrator C
19. Dust Toy Aid Than Shoe His Hour Men Near Few 40 41 Rooms 43 44 45 46 AT 48 49 50 42 40 41 42 43 44 45 46 4T 48 49 50 40 4 42 43 44 45 46 4T 48 49 50 Off Ham Star Eat Thin Flat Well By Buy Ail Ale On If Raw Glove Ten Bull Through Chair We Ate Eight Year Jump Pale Pail Go Stiff Can Through Thru Clothes Who Bee Be Yew You Am 1761 0100 Rev B 1761 0100 oo RW DD Sidewalk Birthday Cupcake Airplane Headlight Blackbird Shotgun Eyebrow 9 10 Baseball 11 Stairway 12 Armchair 13 Playground 14 Doorstep Railroad 15 16 17 18 19 20 21 22 23 Hotdog Outside 26 2 28 24 Mousetrap Cowboy Wigwam Coughdrop Churchbell Sunset Daylight Footstool Pancake Scarecrow Playmate Rainbow Children s Spondee List 29 30 3 32 33 34 335 36 37 38 39 40 Shoelace 42 41 Toothbrush Dishpan Bathtub Jackknife Ice Cream Schoolroom Backyard Doorbell Drugstore Streetcar Hopscotch Jump Rope Hairbrush 43 44 45 46 4T 48 49 50 51 52 54 55 56 57 Appendix 1 Test Words Necktie Ash Tray Bedroom Toy Shop Playpen Dollhouse Highchair Downtown Meatball Sunshine Barnyard Bus Stop Football Bluejay Birdnest Appendix 1 3
20. HEX ASCII characters 6 6 1761 0100 Rev B Chapter 6 Remote Options Remote Input Operation 1761 0100 Rev B Validation Each character is validated for parity framing overrun and break interrupt errors If an error is detected an error message is displayed to indicate the type of error For overrun errors an error record is transmitted back to the remote For parity and framing errors no error record is transmitted since any transmission most likely will result in a similar error at the remote and the record would be unintelligible If a spurious character is received an error message is flashed on the LCD When a complete input record is received the record is validated and processed If the record is invalid an error record is transmitted back to the remote device input records are validated in the following manner must begin with a and end with a carriage return line feed sequence must contain all valid ASCII characters must contain a valid record type must contain a valid function code and must contain a valid function subcode when required Acknowledgment The GSI 61 will acknowledge the correct reception and processing of all input records by transmitting an ASCII ACK character after the record has been processed This record acknowledgment will not be sent if the GSI16 compatible record format has been selected Input Record Type These records are sent by the remote device to c
21. If a separate examination sound room is used it is considered sufficiently quiet for the purposes of these tests if a group of otologically normal listeners with their ears occluded is unable to detect any ambient noise during the test period See ANSI 53 1 Criteria for Permissible Ambient Noise during Audiometric Testing for maximum allowable outside octave band noise levels with three prefabricated sound room types Note Live voice testing requires a separate sound attenuated room for the patient in order to avoid feedback and direct transmission of the test stimuli 2 26 1761 0100 Rev B Chapter 2 Installation Single Room Environment Place the GSI 61 on the desk or table where it will be used The location should be near grounded electrical outlet which 15 needed to accommodate the GSI 61 power cord Allow a minimum of 2 inches of clearance around the GSI 61 for heat dissipation Refer to Rear Panel Figure page 2 2 With the LCD panel in the down position to allow access to the rear connector panel connect the following Test microphone monitor headset External and External if used Power cord for the CD player if used Patient talk back microphone Test headset red right ear phone blue left ear phone or the cables for the optional High Frequency phones Insert ear phones optional Bone vibrator Patient response handswitch Speakers Printer b connect the optional high f
22. If configured the report can also be e mailed Every GSI 61 that has a remote board RS 232 or USB is compatible with GSI Suite 1761 0100 Rev B Chapter 6 Remote Options Data Flow Control Operation Hardware Flow Control When hardware control is selected RTS CTS handshaking is used The remote device may use the RTS signal to allow or inhibit data transmission for the GSI 61 to the remote device When the RTS signal 15 set true by the remote device the 55161 is enabled to transmit data When the RTS signal is set false by the remote device the GSI 61 is inhibited from transmitting data The remote device should insure that RTS is set true prior to requesting data from the GSI 61 If the RTS signal is false at the start of a transmission or goes false during a transmission the GSI 61 will wait for 6 seconds for the signal to return true If this does not occur the transmission is aborted and the error message Not Available will temporarily flash The GSI 61 uses the CTS signal to allow or inhibit data transmission from the remote device to the GSI 61 When the CTS signal is set true by the GSI 61 the remote device may transmit to the GSI 61 When the CTS signal is set false by the GSI 61 the remote device must not transmit to the GSI 61 Failure to comply with this condition may result in the loss of data transmitted to the GSI 61 The GSI 61 will set the CTS line false to prevent data transmission by a remote computer This
23. Loopback diagnostic modes Nonstandard frequencies frequencies outside the current range or frequencies invalid for the current transducer are invalid and will result in an error record being transmitted Frequencies greater than 12 kHz are invalid if the GSI 16 compatible record format is selected and will also result in an error record being transmitted Character Number of Field Name Field Description Offset Characters 4 5 Test Frequency Format Frequency value in Hz i e 750 Hz 750 Range Low Freq 125 Hz to 12 kHz High Freq 8 K to 20 kHz Resolution Standard Audio frequencies 2 Record CR Terminator Grason Stadler GSI 61 CLINICAL AUDIOMETER Input Record Type 7 Set HL Record The record which is set by this record varies based on the operating mode indicated below This record type is invalid in the Push Button Diagnostic Display Diagnostic and Loopback Diagnostic modes and will result in an error record being transmitted Character Number of Field Name Field Description Offset Characters 2 Function Code 01 Chl Ch2 4 HL value Format HL value with 1 implied decimal position i e 20 dB HL 200 Range Low Frequency 10 to 120 dB HL High Frequency 20 to 100 dB HL Resolution 1 dB 1761 0100 Rev B Chapter 6 Remote Options Remote Output Operation Output Record Type 1 GSI 16 Compatible Short Data 1761 0100 Rev B These records are sent by th
24. Printing may be cancelled by pressing the PRINT AUDIOGRAM pushbutton a second time while the Printing message is displayed A Printing Cancelled message will then flash on the display Multiple Copies Additional copies of the audiometric test results are printed each time the PRINT AUDIOGRAM pushbutton is pressed after the Printing message disappears from the display Instrument Operation The GSI61 remains operational while printing with the following exceptions pressing while Printing the Data Erase Save Data Transfer and Remote pushbuttons will result in the error message Invalid Selection Remote Operation The Remote port operation is inactive while audiometric test results are being printed RS 232 or USB Interface 1761 0100 Rev B 2 19 Grason Stadler GSI 61 CLINICAL AUDIOMETER Error Messages The GSI 61 displays error messages when the PRINT AUDIOGRAM pushbutton is pressed when the following conditions exist If there is currently no saved data this error message will be flashed No Test Data Stored If test data exists the presence of the Remote Printer Option board is verified if it is not present this error message will be flashed Not Available If the Remote Printer Option board is present a check will be done to see if a print Job is already in progress If so it will be cancelled If the Remote is currently in use this error message will be flashed Invalid Selection If all of the above is s
25. Pure Tone Stenger Test 4 12 Biological Calibration Check 5 1 Periodic Checks 5 1 Calibration Reference Levels 5 3 Line Voltage Brownout and Interruptions 5 6 The Message CAL 5 6 The Message Help 5 6 1761 0100 Rev B Table of Contents RS 232 Configuration 6 1 h apter 6 USB Overview 6 3 Remote Options Driver Installation and System Setup 6 4 GSI Suite 6 4 Data Flow Control Operation 6 5 Hardware Flow Control 6 5 Software Flow Control
26. Test 125 Hz fields Alternate Test See Alternate Test 125 Hz fields Alternate Test See Alternate Test 125 Hz fields Alternate Test See Alternate Test 125 Hz fields Low Frequency Alternate Test See Alternate Test 12 kHz 125 Hz fields Alternate Test See Alternate Test 8 kHz 125 Hz fields High Frequency Alternate Test See Alternate Test 9 kHz 125 Hz fields Alternate Test See Alternate Test 10 kHz 125 Hz fields Alternate Test See Alternate Test 11 2 kHz 125 Hz fields Alternate Test See Alternate Test 12 5 kHz 125 Hz fields 6 22 1761 0100 Rev B Chapter 6 Remote Options Character Number of Data Type Field Name Field Description Offset Characters 784 Alternate Test See Alternate Test 14 kHz 125 fields Alternate Test See Alternate Test 16 kHz 125 fields Alternate Test See Alternate Test 18 kHz 125 fields Alternate Test See Alternate Test 20 kHz 125 fields Right Ear Test 816 814 See Left Ear fields Data Reco rd 1630 2 uChar Checksum See page 6 4 Terminator Checksums 2 ASCII Record Terminator TCR SE Note HL threshold values are transmitted as hexadecimal values scaled by 2 Output Record Contains the instrument type and software version information This record is not GSI 16 Type 7 compatible Instrument Type Character Offset Number of Field Name Field Description Characters Record Terminator LF
27. Test 125 Hz Fields 538 10 SISI Test 8 kHz See SISI Test 125 Hz Low Frequency Fields 548 10 SISI Test 12 kHz See SISI Test 125 Hz Fields 558 10 SISI Test 8 kHz See SISI Test 125 Hz High Frequency Fields 568 10 SISI Test 9 kHz See SISI Test 125 Hz Fields SISI Test 10 kHz See SISI Test 125 Hz Fields SISI Test 11 2 kHz See SISI Test 125 Hz Fields 598 10 SISI Test 12 5 kHz See SISI Test 125 Hz Fields 608 10 SISI Test 14 kHz See SISI Test 125 Hz Fields 618 10 SISI Test 16 kHz See SISI Test 125 Hz Fields SISI Test 18 kHz See SISI Test 125 Hz Fields SISI Test 20 kHz See SISI Test 125 Hz Fields 1761 0100 Rev B 6 21 Grason Stadler GSI 61 CLINICAL AUDIOMETER Alternate ABLB Character Nunber of Data Type Field Name Field Description Offset Characters 648 4 sInt Alternate Test 20 to 120 dB x 2 125 Hz Test Ear NR 260 to 540 Threshold NT 32768 0x8000 652 4 sInt Alternate Test 20 to 120 dB x 2 125 Hz Masking NR 260 to 540 Ear Threshold NT 32768 0x8000 Alternate Test See Alternate Test 250 Hz 125 Hz fields Alternate Test See Alternate Test 500 Hz 125 Hz fields 672 Alternate Test See Alternate Test 750 Hz 125 Hz fields 680 Alternate Test See Alternate Test 125 Hz fields 688 Alternate Test See Alternate Test 1 5 kHz 125 Hz fields Alternate Test See Alternate Test 125 Hz fields Alternate Test See Alternate
28. and the earphone with the blue connector over the left ear Placement of the Insert Phone If insert phones are used push the correctly sized eartip onto the earphone and then place the insert phone securely into the patient s ear When using the paired insert phones follow the manufacturer s recommended procedure for eartip placement and insertion Placement of the Bone Vibrator The bone vibrator may be placed on the promontory of the mastoid process or on the forehead whichever has been selected for calibration 1761 0100 Rev B Chapter 3 Operation Routine Test Procedures The following procedures are in compliance with the current ANSI and ISO recommendations for Manual Pure Tone Threshold Audiometry Preliminary a Turn on the instrument and allow it to come to operating temperature b Check that the transducers and other system components are operating properly C Seatthe patient comfortably in the test area d Explain the test procedure Assist the patient with the earphones or bone vibrator placement Patient Familiarization a Select the proper output transducer routing to the desired ear p Demonstrate the 1000 Hz tone at 40 dB HL or at a level estimated to evoke a prompt and clear response to the patient The tone duration should be between one and two seconds Setthe Channel 1 attenuator to 10 dB d Practice beginning with the tone continuously on gradually increase the intensity
29. color Prints are in B amp W Do Not Use Default No bar code is printed Bar code is printed When the GSI 61 is connected to the computer it will show up on the PC as a virtual COM port The application will need to select that COM port Generally the serial port parameters baud rate stop bits parity handshaking etc are then arbitrary and the virtual COM port driver handles all of those considerations Simply select the desired COM port and accept the default parameters for baud rate parity etc The virtual COM port normally appears as 5 The COM designation can be changed through the Windows Hardware Device Manager if necessary GSI Suite Audiometric Data Management software is compatible with the GSI 61 as well as the TympStar GSI Suite captures saves and stores audiometric data from the GSI 61 and allows the addition of comments into a report It can also provide the data in a PDF format that is compatible with electronic medical data records Data transferred from the GSI 61 include the following air conduction masked and unmasked thresholds bone conduction masked and unmasked thresholds and sound field thresholds Speech information and Pure Tone Averages are entered manually in the appropriate fields with GSI Suite All Masking levels are saved and printed on the report created by GSI Suite The audiogram is saved to a directory for future retrieval and or converted to PDF format for easy transfer to an EMR program
30. factory installed on the GSI 61 In addition to a choice of color or black and white a choice of separate left and right or overlaid left and right audiograms is provided The GSI 61 supports most HP Hewlett Packard DeskJet Series Printers that use PCL 3 Contact GSI Service for specific models The Remote Printer board option includes a set of external DIP switches which enable the operator to reconfigure the printer color and the audiogram format The board is located on the right side near the rear of the instrument Refer to the figure on page 2 4 The switch definitions are as follows 1761 0100 Rev B Chapter 2 Installation DIP Switches Audiogram Format Dip switch 1 OFF ON Printer Color Selection Separate Left and Right Audiograms Overlaid Left and Right Audiograms Dip switch 2 Selection OFF Color Printing ON Black and white Printing Dip switch 3 Not Used Print Bar Code Dip switch 4 Selection OFF Print bar code ON Do not print bar code Parallel Port The Remote Printer board has a standard PC type parallel printer port The printer is connected to this port with a standard PC type parallel printer cable User Interface Printing Pressing the PRINT AUDIOGRAM pushbutton on the front panel of the GSI 61 will send the stored threshold data to the printer If turned ON a bar code will be printed with the audiogram The bar code can be used to quickly input data with AudioScan systems Cancel the Print
31. for all transducers to the corresponding points in the connector panel on the outside of the examination sound room Refer to the Figures on page 2 23 for the optional High Frequency installation Plug the monitor headset into the rear panel jack Be certain that the transducers connect to the corresponding patch cords through the connector panel d Connect the optional speaker cable to the connector marked Speaker on the rear of the GSI 61 Pass the other ends of the cable through the grommet holes in the control panel of the sound room Connect the cable marked left to the left speaker and the one marked right to the right speaker CAUTION The wire ends must not touch each other or any other conductive surface Do not use patch cords with or instead of the supplied speaker cables Damage to amplifiers inside the GSI 61 will occur e Mount the speakers in the corners of the sound room Position the speakers three feet one meter from the patient The cone of the speaker should be at the same height as the ear of the average patient seated in the normal listening position Note transducers are pre calibrated except for the speakers Contact a local GSI representative to install and calibrate the sound field system f Plug the power cord into a grounded outlet Turn the unit on and observe that the GSI 61 is receiving power The small power LED on the front panel is illuminated The unit is initialized to Tone Pho
32. hearing level if Channel 1 is lowered For example select SPKR SPKR 1000 Hz Tone Narrow Band and Left for Channel 1 and Right for Channel 2 Set both Channel 1 and Channel 2 at the maximum dB HL levels If Channel 1 is lowered by 5 dB it is possible to then increase Channel 2 by 5 dB Frequency Limits It is not possible to select a test frequency that is invalid for a particular transducer The Test Frequency buttons will roll over to the lowest frequency after the last valid frequency or the frequency will automatically go to the nearest valid value when a different transducer is selected dB HL Limits per Frequency and Transducer Bone Vibrator 0 DO 1761 0100 1761 0100 Chapter 2 Installation dB HL Limits per Frequency and Transducer continued Bone Vibrator Notes 1 The High Frequency Phones specified are the Sennheiser HDA 200 Phones 2 The maximum hearing level for speech with the speech filter in place is 100 dB Note The hearing levels listed in this table are guaranteed maximum levels These levels are guaranteed only if ANSI ISO or GSI reference threshold levels and not customized calibration values are used The GSI 61 provides hearing level limits to at least the values listed However at no time will the hearing level limit exceed 120 dB HL 2 25 Grason Stadler GSI 61 CLINICAL AUDIOMETER Initial Installation Elimination of Ambient Noise T
33. occurs while processing a completed input command while printing while the GSI 61 is transmitting a record and whenever the remote device is not enabled through the Remote button Software Flow Control When software flow control is selected XON XOFF handshaking is used Software XON XOFF flow control is available to allow software commands from the external computer to start and stop the flow of data from the GSI 61 The XOFF character used is the ASCII control character DC3 The XON character used is ASCII control character Sending XOFF to the GSI 61 pauses its transmission sending XON to the GSI 61 resumes the transmission Once XOFF is received by the instrument XON must be received within 6 seconds If it is not received within this time constraint the error message Not Available is flashed on the front LCD panel Cable Connections The GSI 61 remote interface provides a serial interface consisting of RxD Received Data TxD Transmitted Data RTS Request to Send CTS Clear to Send and ground signals at the end of the supplied DB 25 male connector This cable which is supplied with the Remote Option can also be purchased as an Apple Hayes Modem cable available from Apple dealers IMPORTANT Make sure this cable incorporates all the signals in the figure below 1761 0100 Rev B 6 5 Grason Stadler GSI 61 CLINICAL AUDIOMETER Data Transfer Record and Field Formatting Communication with the rem
34. selected parameters are displayed on an articulating Liquid Crystal Display LCD Pure tone test results are presented in either a status or an audiogram format The status format clearly shows all test conditions and permits the calibration check of input from the microphone or from recorded test materials The audiogram format for pure tone testing displays the stored threshold values for the patient under test The display can be tilted to improve the viewing angle for an individual user and to allow easy access to the rear jack panel The GSI 61 provides testing capabilities for a standard battery of diagnostic audiometric tests including ABLB SISI Tone Decay Stenger Doerfler Stewart Lombard and Staggered Spondaic Word test using a three head tape recorder The High Frequency option extends the frequency range from 8 kHz to 20 kHz for ototoxic drug monitoring The GSI 61 has the optional capability of printing the stored audiogram data or of sending the data to aremote computer through an RS 232 or USB interface The RS 232 and USB interface are bidirectional to allow the operator to transmit test results to a computer and to control the audiometer from a remote computer system The transmittable data record can be configured to be either a single value threshold and frequency or battery transfer all stored parameters for a patient 1761 0100 Rev B 1 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER Blank page 1 2 1761
35. the compared growth of loudness of a tone of identical frequency in the normal ear Recruitment if present may be found Assist the patient with the placement of the earphones Determine the threshold level for each ear at all frequencies being tested Select the ear to serve as the reference ear typically the ear with the better hearing sensitivity This ear will receive the tone at a fixed intensity Select the ALTernate tone format Channel 1 and Channel 2 will automatically interlock in this selected format The Interrupt button should be selected for automatic presentation of the tone The tone will alternate from Channel 1 at the rate of 400 on 400 off followed by Channel 2 at 400 msec on 400 msec off The tone may be manually alternated between Channel 1 Right and Channel 2 Left by pressing the tone bar with the Interrupt in the off position for the duration of the time the signals are to be presented To increase the test reliability the patient should be given several trials to judge whether a variable tone is softer equal to or louder than the tone in the reference ear Set the intensity of the tone for each channel to 20 dB above the threshold of each corresponding ear Alternate the tone presentation between the ears Keeping the intensity fixed in the reference ear vary the intensity level of the tone presented to the test ear Record the level at which the patient judges both of t
36. with 2 dB step size 4 Reserved for GSI 10 45 On with 5 dB step size 1 Timing 0 None Steady 1 Reserved for the GSI 10 2 Pulsed 200 200 msec on off 1761 0100 Rev B 1761 0100 Chapter 6 Remote Options Character Number of Field Name Field Description Offset Characters 1 Ch 2 Stimulus 1 Tone 2 NB Noise 3 White Noise 4 Speech Noise 5 Mic 6 Ext A 10 1 Transducer Ch 1 Ch 2 1 Bone 2 Spk Spk 3 Spk 4 Bone Phone 5 Phone 6 Bone Spk 7 Bone Insert 8 Spk Bone 0 Spk Insert Phone Bone Phone Spk Phone Insert D Insert Bone E Insert Spk Insert Phone Insert Insert 11 1 Output Routing Chl 0 None 1 2 Right 3 4 Right UO DR 6 Left 7 Right 8 LR 9 LR None B None Left D Right 0 Released 12 1 Subject Response 1 Pressed 13 1 O Off Te On 14 1 Interlock 0 Off esos On 15 1 Tracking 0 Off On 18 1 HL Step Size 1 1 dB 2 Reserved for GSI 10 3 5 dB 4 2 dB 6 17 Grason Stadler GSI 61 CLINICAL AUDIOMETER Output Record Type 6 Test Bat
37. 0 XXI Spanish 1761 9700 XXS GSI 61 Clinical Audiometer with USB Remote English 1761 9780 XXE French 1761 9780 XXF German 1761 9780 XXG Italian 1761 9780 Spanish 1761 9780 XXS Notes refers to the voltage and plug requirements for the country of operation 1761 0100 Rev B Electromagnetic Compatibility EMC Electromagnetic compatibility EMC Please refer to the Electromagnetic Compatibility Reference Guide on CD part number 482 6387xx EMC information concerning your system Compatibilit lectromagn tique CEM Veuillez vous reporter au guide de r f rence de compatibilit lectromagn tique sur CD num ro de pi ce 482 6387xx pour des informations sur la relatives votre systeme Elektromagnetische Vertraglichkeit EMV Informationen ber die EMV des Systems finden Sie im Referenz Handbuch Elektromagnetische Veriniglchkeit aul der CD Tedenummer 482 645 7 Compatibilita elettromagnetica EMC
38. 0 msec OFF Note that the Pulsed tone is not available in SISI or ALTernate test conditions When a speech test mode is activated Pulsed is no longer activated Alternate This pushbutton locks both channels together and alternates the tone presentation between the two channels 400 msec ON Channel 1 400 msec OFF Channel 1 400 msec ON Channel 2 400 msec OFF Channel 2 Both channels receive TONE as the input stimulus The frequency is automatically set to 1000 Hz and the dB step size HL settings and the routing reflect the conditions prior to the selection of ALTernate test type The tones can be manually presented by depressing either PRESENT bar or automatically presented by pressing either INTERRUPT button The intensity of the tones can be adjusted independently by use of the Channel 1 and Channel 2 attenuators SISI This pushbutton provides an intensity increment every 5 seconds to a steady or FM tone in the selected channel for 200 milliseconds The SISI test may be run at step sizes of 1 0 2 0 or 5 0 dB When SISI is selected the GSI 61 automatically initializes Channel 1 to receive tone and Channel 2 to receive NB noise The step size is initialized to 5 0 dB but may be changed to either 1 0 or 2 0 dB at any time during the test Channel 1 and Channel 2 are set to 0 dB HL the frequency is set to 1000 Hz Output transducer and routing reflects the state of the GSI 61 prior to the selection of SISI Depress the Interrupt pushbutton to all
39. 0100 Rev B Chapter 2 Installation External Inspection Unpacking Although this GSI 61 Clinical Audiometer was carefully tested inspected and packed for shipping it is good practice after receiving the instrument to immediately examine the outside of the container for signs of damage Notify the carrier 11 any damage is observed Carefully remove the GSI 61 from its shipping container If the instrument appears to have suffered mechanical damage notify the carrier immediately so that a proper claim can be made Be certain to save all packing material so that the claim adjuster can inspect it as well As soon as the carrier has completed the inspection notify a Grason Stadler representative If the instrument must be returned to the factory repack it carefully in the original container if possible and return it prepaid to the factory for the necessary adjustments Check that all accessories itemized below are received in good condition If any accessories are missing a Grason Stadler representative should be notified immediately See the Specifications Section of this manual for the catalog numbers of accessories and also for a listing of the optional accessories Accessories Supplied 1761 0100 Rev B Test Microphone Monitor Headset Test Headset Assembly Patient Talkback Bone Microphone Patient Response Vibrator Handswitch Assembly Not Shown For Sound Booth use Handswitch Patch Cord 1 Bone Vi
40. 112K 125K 14K 16 18 K 20K Sennheiser HDA 200 16 0 17 0 21 5 21 0 27 5 37 5 58 0 83 105 Reference threshold values based ISO TC 43 WG 1 N 190 and Tom Frank PhD High Freq Hearing Thresholds in Young Adults Using a Commercially Available Audiometer Ear and Hearing Vol 11 No 6 1990 5 5 Grason Stadler GSI 61 CLINICAL AUDIOMETER The Message CAL The calibration for the GSI 61 is stored in the system s memory and this data is continually monitored If an error should be found in the calibration memory the message is displayed in the appropriate channel s intensity area CAL is displayed as long as the faulted transducer and stimulus combination is selected The channel is forced into an off condition and cannot be turned on until a new stimulus and transducer combination is selected When the message CAL appears in either Channel 1 or Channel 2 note the specific combination selected Try the same combination on the alternate channel Or power down and power up to attempt to clear the fault Should CAL continue to be displayed contact a service representative and report the specific combinations and conditions used The Message Help Should the message Help appear in the message area of the display the GSI 61 will enter a lock out mode which will disable all front panel operations In addition to the message Help code numbers will appear These numbers are important as they indica
41. 2 Armchair 11 3 Baseball 12 4 Birthday 13 5 Cowboy 14 6 Daybreak 15 7 Doormat 16 8 Drawbridge 17 9 Duckpond 18 Part Two 1761 0100 Rev B Mg ta B c This appendix consists of two parts Appendix 1 Part One contains an Alphabetical List of the Spondaic Words Used in Auditory Tests W 1 and W 2 SRT W 1 is a constant level recording W 2 is a descending level recording Part Two contains the words PB Word Lists used in Auditory Test W 22 Discrimination Alphabetical list of the Spondaic Words used in Auditory Tests W 1 W 2 An Yard Carve Us Day Toe Felt Stove 9 Hunt 10 Ran 11 Knees 12 Not Knot 13 Mew Eardrum Farewell Grandson Greyhound Hardware Headlight Horseshoe Hotdog Hothouse 14 15 16 If 18 19 20 21 22 19 20 21 22 23 24 25 26 24 Iceberg 28 Inkwell 29 Mousetrap 30 Mushrooms 3 Northwest 32 Oatmeal 33 Padlock 34 Pancake 33 Playground 36 Railroad Schoolboy Sidewalk Stairway Sunset Toothbrush Whitewash Woodwork Workshop CID Auditory Test W 22 PB Word Lists List 1 Low Owl It She High There Their Earn Urn Twins Could 23 24 25 26 What Bathe Ace You Ewe 27 28 29 30 31 32 33 34 35 36 37 38 39 Wet Chew See Sea Deaf Them Give True Isle Aisle Law Me None Nun 40 Jam 41 Poor 42 Hi
42. 3 pp 132 146 1968 Newby H A Audiology Forth Edition Prentice Hall 1979 Olsen W O and Noffsinger D Comparison of One New and Three Old Tests of Auditory Adaption Arch Otolaryngol 99 1974 pp 94 99 Owens E Tone Decay in Eighth Nerve and Cochlear Lesions J Speech Hear Disord 29 1964 pp 14 22 2 1761 0100 Regulatory Symbols Symbol for NOT REUSE EN 980 Symbol for USE BY 980 Symbol for SERIAL NUMBER Symbol for STERILIZE including the METHOD FOR 980 Symbol for method of sterilization using irradiation 980 Symbol method of sterilization using steam dry heat 980 Symbol for European Representative _ Y 980 Symbol for Manufacturer NO 980 Symbol for Date of Manufacture 1 1761 0100
43. 6 Unaided Test Based on the Carhart Method 1946 Seat the patient in a sound field room 6 feet by 6 feet at a distance equal to one meter from the speakers The patient s ears should be at the same level with the face of the speaker The Insert phone may be selected as an alternate transducer for hearing aid evaluation Adjust Ext A and or Mic to peak at an average of 0 on the VU meter Score each correct response by pressing the Correct button and each wrong response by pressing the Incorrect button to obtain an unaided Speech Reception Threshold SRT Live speech or recorded spondees will be presented in the test ear Continue with unaided word discrimination testing to obtain a word discrimination score Obtain an unaided estimate of tolerance limits Uncomfortable Loudness Level or UCL The patient should be told that the clinician s voice will be uncomfortably loud but he should report whether he actually feels a pressure a tickle or pain Beginning at the speech reception threshold level the patient is requested to answer simple questions while the attenuator for the selected channel is increased in 5 dB steps Continue this procedure until a reading of 80 to 90 dB HL is reached or until the patient indicates that the sound is painful 1761 0100 Rev B 1761 0100 Chapter 4 Special Test Procedures Aided Test The following aided tests are then performed for comparison Obtain an aided Speech Reception Thres
44. Bone Conduction Sound Field optional Paired Insert optional Single Insert optional Total Harmonic Distortion Intensity Range Air Conduction High Frequency Bone Conduction Mastoid Forehead Sound Field Paired Inserts Single Insert 125 Hz to 12000 Hz 8 kHz to 20 KHz 250 Hz to 8000 Hz 125 Hzto 12 000 Hz 125 Hz to 16 000 Hz only with High Frequency option 1761 9630 enabled 125 Hz to 8000 Hz 250 Hz to 6000 Hz 1 2 earphones and paired insert phones 596 bone vibrator JOdB HL to 120 dB HL 20 dB HL to 100 dB HL with Sennheiser HDA 200 Phones 10 dB HL to 80 dB HL 10 dB HL to 70 dB HL 10 dB HL to 96 dB HL JOdB HL to 110dB HL JOdB HL to 110dB HL Masking Intensity Range Calibrated in effective masking Narrow Band Noise White Noise Optional accessories Maximum dB HL is 15 dB below tone Maximum dB HL is 30 dB below tone The maximum HL values are applicable to the middle frequencies only GSI 61 isa registered trademark of Grason Stadler All rights reserved Grason Stadler GSI 61 CLINICAL Speech Channel 1 and Microphone For live voice testing and communications Channel 2 Signal Format Special Test Capabilities Communications and Monitoring Dimensions and Weight vi External A and External B Accepts recorded speech material from external stereo tape cassette or CD player Intensity Range Air Conductio
45. GSI 61 SI U ser anua id e Grason Stadler Part Number 1761 0100 Rev B Www grason stadler com rason tadler 7825 Golden Inangle Drive Suite Eden Prairie MN 55344 500 00 22 82 952 2 fod fax 952 2 78 440 em all Info grasan stadler com Title GSI 61 User Manual Copyright 2011 Grason Stadler Inc All rights reserved part of this publication may be reproduced or transmitted in any form or by any means without the prior written permission of Grason Stadler Inc The information in this publication is proprietary to Grason Stadler Compliance The CE 0344 mark identifies compliance with the Medical Device Directive 93 42 EEC Grason Stadler is an ISO 13485 certified corporation European Authority Representative Grason Stadler Kongebakken 9 2765 Sm rum Denmark 0344 1761 0100 Rev B Warnings Cautions Errors Warning Accessory equipment connected to the analog and digital interfaces must be certified to the respective IEC standards IEC950 for data processing or IEC 60601 1 for medical equipment Furthermore all configurations shall comply with the system standard IEC 60601 1 1 Everyone who connects additional equipment to the signal input or signal output port configures a medical system and is therefore responsible that the system complies with the requirements of the system standard IEC60601 1 1 If in doubt consult the technical ser
46. High Frequency Cables to sound booth 1761 9603 If using High Freq Headphones these cables are required to connect to the GSI 61 High Frequency Headphones w cables to GSI 61 1761 9604 High Frequency Cables to GSI 61 1761 9605 If using High Freq Headphones these cables are required to connect to the GSI 61 Remote RS 232 Printer Interface 1761 9680 Printer Color North America only 1761 9610 Service Manual 1761 0110 Audiocups 8000 0155 OtoAccess Network Software for GSI Suite 1015 9600 Vil Grason Stadler GSI 61 CLINICAL Catalog Listings viii GSI 61 Clinical Audiometer without Remote English 1761 9700 XXE French 1761 9700 XXF German 1761 9700 XXG Italian 1761 970
47. I 61 Audiometer These messages will TYPEB be displayed in one of the bottom three message areas 1761 0100 Rev B Grason Stadler GSI 61 CLINICAL AUDIOMETER Status Messages Using Default Data Indicates that the selected transducer and stimulus are not calibrated to standard specified ANSI TSO levels Erasing Data Indicates that the GSI 61 is clearing stored test information Saving Data Indicates that the test information is being saved into memory No Test Data Stored Indicates that there is no test data available to be erased or printed Check Hi Freq Cables Indicates that the High Frequency function is enabled but the cables plugged into the L amp R phone jacks not the GSI specified type Invalid Selection Indicates that an incorrect selection such as incompatible transducers has been made Not Available Indicates an uninstalled option has been selected No Test Data Stored Indicates that there is no data available for printing although the Print Audiogram button has been pressed Data Transfer Indicates that data has been processed either by the printer or by aremote computer Check Printer A check is done to see if the printer is connected and ready to receive data by checking the hardware flow control line If printer is not ready this message will be flashed Printing This is an informational message which is displayed while outputting data to the printer It appears on the lower right section of the LCD No P
48. Insert 11 1 Output Routing Chl 0 None 1 2 Right 3 4 Right D SLR 6 Left 7 Right 8 LR 9 LR A None None Cr sett D Right M 13 1 On 14 1 Interlock 0 sepe On 0 Released 1 Pressed 1761 0100 Rev B Output Record Type 4 Error Record 1761 0100 Rev B Chapter 6 Remote Options Character Number of Field Name Field Description Offset Characters 15 1 Tracking 0 Off s A On 18 1 HL Step Size 1 1 dB 2 Reserved for GSI 10 3 5 dB 4 2 dB 19 4 Ch 1 Numeric 100 to 1200 HL Display Data Range 10 0 to 120 0 dB 25 1 Ch 1 Interrupt 0 Off On 24 4 Ch 2 Numeric HL 100 to 1200 Display Data Range 10 0 to 120 0 dB 28 1 Ch 2 Interrupt 0 Off di On 29 5 Frequency Display __125 to 12000 Data Range 125 to 12000 Hz in standard audiometric frequencies 42 2 Record Terminator CR LF Contains information on the type of error which has occurred The types of errors which would result in an Error Record are e System errors e Input record which has an incorrect format or is invalid for the current operating mode e Pushbutton operation commands which are invalid Character Offset Number of Field Name Field Description Characters 2 Error Codes LOS 6
49. NICAL AUDIOMETER Pure Tone Stenger Test If two tones identical in all ways except loudness are introduced simultaneously into both ears only the louder tone will be perceived Screening Procedure 1 Assist the patient with the placement of earphones 2 Use standard audiometric techniques to obtain a record of the patient s thresholds at each test frequency in both the good and the poor ear 3 Interlock the tone bars of Channel 1 and Channel 2 Route the tone to both ear simultaneously Channel 1 Right Channel 2 Left 4 Select the desired frequency Set the attenuator for the channel routed to the better ear at a level 10 dB above the threshold for that ear Set the attenuator for the channel routed to the poorer ear at a level 10 dB below the threshold for that ear Present the simultaneous tones Obtaining Minimum Contralateral Interference Levels 1 Present a tone at 10 dB SL to the better ear while simultaneously Channel 1 and Channel 2 interlocked presenting a tone at 0 dB HL to the poorer ear 2 Maintain the same intensity level in the good ear but raise the intensity for the poorer ear by 5 dB and present the two tones 3 With each response continue to present the tones to each ear simultaneously Raise the tone routed to the poorer ear by 5 dB each time the patient fails to respond Modified or Speech Stenger Test Used as is the Pure Tone Stenger test in unilateral hearing losses to determine the level of
50. Vedere la guida alla consultazione per la compatibilit elettromagnetica contenuta sul CD numero di parte 482 6387xx per informazioni sulla compatibilit elettromagnetica relativa al sistema in dotazione Compatibilidad electromagn tica CEM Consulte la Guia de referencia sobre compatibilidad electrom gnetica incluida en el CD n mero de pieza 482 6587xx para obtener la informaci n sobre la CEM de su sistema Electromagnetic compatibility EM C Please refer to the Electromagnetic Compatibility Reference Guide on CD part number 482 6387xx for EMC information concerning your system FB XE EMC fils WEA CD 482 6387 EMC 5 7 482 6387 O Ei 7x br ade Fl amp EH Hdd EMC ABE FOE 4 X HE 482 6387 3E SEI 2 Compatibilidade Eletromagn tica EMC Favor consultar o Guia de Refer ncia Compatibilidade Eletromagn tica no CD n mero 482 6387xx para informa es da EMC relativas ao seu sistema 1761 0100 Rev B Table of Contents Preface Chapter 1 Introduction Chapter 2 Installation 1761 0100 Rev B 1 Warnings Cautions and Errors
51. ansducer and frequency combination Error message status message Refer to Chapter 6 for a description of the error and status messages These boxes appear only when a message is displayed 2 15 Grason Stadler GSI 61 CLINICAL AUDIOMETER In the next figure High Frequency Audiogram the x axis is labeled Right Ear or Left Ear Frequency kHz and is marked at the frequency levels of 8 kHz 10 kHz 12 5 kHz 16 kHz and 20 kHz The dashed grid lines are displayed at the intermediate frequencies of 9 kHz 11 2 kHz 14 kHz and 18 kHz The y axis ordinate is incremented every 10 dB starting at 20 dB HL and ending at 110 dB HL A crosshair spanning the length and width of the audiogram shows the current frequency and dB level for the ear under test Audiometric Symbols Left Ear Response 1 Right Ear Response N lt L 5 2 16 High S 1 2 4 iS A m lt lt Frequency Audiogram No Response Description Air conduction unmasked phone or insert Air conduction masked phone or insert Bone conduction mastoid unmasked Bone conduction mastoid masked Bone conduction forehead masked No Response Description Air conduction unmasked phone or insert Air conduction masked phone or insert Bone conduction mastoid unmasked Bone conduction mastoid masked Bone conduction forehead masked No Response Description Bone conduction forehead
52. aphy Bibliography B 1 Bibliography for Test Procedures B 2 Reg u ato ry Regulatory Symbols 1 Symbols 1761 0100 Rev B Contents 3 Grason Stadler GSI 61 CLINICAL AUDIOMETER Blank page Contents 4 1761 0100 Rev B Chapter 1 Introduction The GSI 61 Clinical Audiometer is a microprocessor controlled two channel audiometer for use in the clinical diagnostic environment It has two separate sets of controls one for each of the channels Each channel can be operated independently by its tone bar or the two channels can be activated simultaneously through use of the interlock button The GSI 61 permits the output routing of the test signal through earphones matched TDH 50P a bone vibrator B71 optional loudspeakers optional paired Insert Phones EAR or single Insert Phone and optional High Frequency Sennheiser HDA 200 Earphones The diagnostic tests are easily selected through use of the ergonomically designed front key panel Flexible routing selections permit the user to select that which 16 appropriate for the test sequence The Tracking pushbutton allows the operator to synchronize intensity changes on Channel 2 with those made on Channel 1 data including the instrument
53. at our option replaced at no charge except for transportation costs when returned to an authorized Grason Stadler facility If field service is requested there will be no charge for labor or material however there will be a charge for travel expense at the service center s current rate Note Changes in the product not approved in writing by Grason Stadler shall void this warranty Grason Stadler shall not be responsible for any indirect special or consequential damages even if notice has been given in advance of the possibility of such damages THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Specifications The GSI 61 Clinical Audiometer meets or exceeds the following standards ANSI S3 6 1989 ANSIS3 43 1992 IEC 645 1 1992 IEC 645 2 1993 ISO 389 UL 2601 1 Medical Electrical Equipment IEC 601 1 Medical Electrical Equipment and CSA C22 2 No 601 1 M90 Electromedical Equipment Standards The CE mark on this product indicates it conforms with the provisions noted in the 93 42 EEC Medical Devices Directive C Mark Medical Device Directive 93 42 0344 European Authority Representative Grason Stadler A S Kongebakken 9 2765 Sm rum Denmark Pure Tone Channel 1 and Channel 2 1761 0100 Rev B Frequency Range Air Conduction High Frequency optional
54. ation Carhart Tone Decay Test 1957 Establish the patient s hearing threshold for the test ear using earphones or insert phones and selecting a pulsed tone Instruct the patient to depress the handswitch as soon as a tone is heard and to release the handswitch only when the tone becomes inaudible Begin the test with a continuous tone Set the intensity for the selected channel to 0 dB SL or 20 dB SL to present an easier listening task The Interrupt pushbutton may be selected or the Tone bar may be manually depressed for the duration of the test As soon as the patient responds begin timing by pressing the Start pushbutton of the scorer timer Record the number of seconds the tone sustains audibility with the Timer on the front panel of the GSI 61 F17 If the tone becomes inaudible before the minute criteria is met without interrupting the tone presentation raise the intensity in 5 dB steps until the tone is heard for a full minute Reset the timer at each increase in intensity level Continue this procedure until the tone is heard for a full minute or until an intensity of 40 dB SL is reached Lombard or Voice Reflex Test 4 8 The Lombard Test is based on the principle that individuals monitor their vocal intensity by means of auditory feedback It is normal for individuals to speak more loudly when exposed to a background of masking noise approximately 16 to 20 dB above the threshold for the noise The patient 1s give
55. atisfied a check 15 done to see if the printer is connected and ready to receive data If not this error message will be flashed Check Printer When all of the above is satisfied an informational message is displayed while outputting data to the printer Printing If during the course of printing communications problems occur this error message will be flashed No Printer Response 2 20 1761 0100 Chapter 2 Installation The printout formats are shown in the following four figures Printer Output Formats m ERR See Low Frequency Dual Audiogram Format Low Frequency Combined Audiogram Format 2 21 1761 0100 Rev B Grason Stadler GSI 61 CLINICAL AUDIOMETER Ta High Frequency Dual Audiogram Format High Frequency Combined Audiogram Format 1761 0100 Rev B 2 22 Chapter 2 Installation It is an option to include high frequency audiometry on the GSI 61 The High Frequency earphones are connected to stereo cable extensions which in turn are connected into the Right and Left phone jacks on the rear panel When the High Frequency option is installed connect the standard 50P earphone cords into the stereo cable extensions labeled Std The following two figures show the installation of the High Frequency and THD 50P earphones When the Sennheiser High Frequency phones are used and the High Frequency option is enabled
56. b 1964 pp 23 35 Swanson D J et al Erythromycin Ototoxicity Prospective Assessment With Serum Concentration and Audiograms in a Study of Patients with Pneumonia Am J Med Jan 1992 1 61 8 Weatherly R A et al Cis Platinum Ototoxicity in Children Laryngoscope 101 9 1991 Sept 917 24 Underwriter s Laboratory Safety Standard 544 For Medical and Dental Equipment Bibliography for Test Procedures Beagley H A and Barnard S Manual for Audiometric Techniques Oxford University Press 1982 Buus S Florentine M Redden R The SISI Test Audiology 21 pp 273 293 365 385 1982 Harbert F And Young M Threshold Auditory Adaption J Aud Res 2 pp 273 293 365 385 1982 Hattler K W and Shuman G I Efficiency of the Stenger Doefler Stewart and Lengthened OFF Time Bekesy Tests Acta Otolaryngol 72 pp 262 267 1971 Hood J D Loudness Balance Procedure for the Measurement of Recruitment Audiology 16 pp 215 228 1977 Jerger J and Jerger S A Simplified Tone Decay Test Arch Otolaryngol 101 pp 403 407 1975 Jerger J and Tillman T ANew Method for the Clinical Determination of Sensorineural Acuity Level SAL Arch Otolaryngol Vol 71 June 1960 pp 948 955 Katz J Handbook of Clinical Audiology William and Wiltkins 3rd Edition 1985 Katz J The SSW Test An Interim Report J Speech and Hearing Disorders 3
57. brator Patch Cord 1 Earphone Patch Cord 2 Other Instruction Manual Power Cord and GSI Suite CD 2 Grason Stadler GSI 61 CLINICAL AUDIOMETER Connectors Controls and Indicators Rear Panel R1 Monitor Headset R2 Ext A and Ext B R3 Talkback Microphone R4 Left and Right Ear Phone Outputs R5 Left and Right 2 2 The connectors on the rear panel of the GSI61 are shown in the following diagram The label and jacks are visible looking down onto the instrument behind the LCD R9 RS R7 R6 R3 R2 ete 3 3 IEC 645 1902 TYPE 1 IEC 645 2 1993 A AE ISO 389 1991 ISO 7566 1987 LoL m um Modular Phone Jack Pin Function Output Voltage Impedance 1 Mic High and 6 VDC 0 2 to 6 0 mV RMS 1 8 K ohm output 2 Phone Low GND 0 ohm 3 Phone High 3 0 mV to 1 0 V 300 ohm 4 Mic Shield GND 0 ohm RCA plug Input jacks for optional stereo tape cassette or CD player Voltage range required 0 2 to 1 0 V to obtain 0 VU Input Impedance 15 K ohm 3 5 mm stereo jack Position Function Output Voltage Impedance 1 Tip Mic High 0 2 to 2 0 mV RMS and 6V AC 10 K ohm 2 Ring Mic Low ee ee 3 Shield Chassis Ground 1 4 inch stereo jack Stereo phone jacks for left blue and right red earphones patch cords or High Frequency earphone connector cords Voltage to 7 0 V RMS 4 45 V RMS for High Frequency Output impedance 5 ohms o
58. by rotating the Channel 1 attenuator until a response occurs Switch the tone off for at least 2 seconds then present the tone again at the same level If there is a second response proceed with a threshold measurement If the second response does not occur repeat this step Threshold Determination Pure Tone Modified Hughson Westlake a The level of the first presentation should be 10 dB below the level at which the patient responded during the familiarization session Present the tone for a period of one to two seconds The time between presentations can be varied but should not be shorter than the test tone itself After each failure to respond to the signal the level is increased by 5 dB until the first response is given After the response the intensity is decreased 10 dB and another ascending process is begun b The threshold is considered to be the minimum intensity setting at which a response has occurred two out of three times at a single level Record this setting by pressing the Save pushbutton or by making a notation on an audiogram form 1761 0100 Rev B 3 3 Grason Stadler GSI 61 CLINICAL AUDIOMETER Test Procedure Test the better ear first b Repeat the sections on Patient Familiarization and Threshold Determination for each tone setting in the following order 1000 Hz 2000 Hz 4000 Hz 8000 Hz Retest 1000 Hz followed by 500 Hz and 250 Hz If there is a difference of 20 dB or greater between octaves test the i
59. centrations Laryngoscope 1990 July 100 7 pp 725 34 McRorie T I et al Aminoglycoside Ototoxicityin Cystic Fibrosis Am Dis Child 1989 Nov 143 11 1328 32 Margolis Robert H et al Masking with Narrow Band FM Noise 7 Acoust Soc Am Vol 56 No 2 August 1974 pp 692 694 Martin Frederic N et al The Present Status of Audiometric Practice A Follow Up Study ASHA July 1978 pp 531 541 Methods for Manual Pure Tone Threshold Audiometry ANSI 53 21 1978 Meyerhoff W L et al Audiologic Threshold Monitoring of Patients Receiving Ototoxic Drugs Ann Otol Rhinol Laryngol 1989 Dec 98 950 54 Michael Paul L et al A Comparison of Acoustic Performance Between a New One piece Earphone Cushion and the Conventional Two piece MX 41 AR Cushion J Acoust Soc Am 67 2 Feb 1980 1761 0100 Rev B 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER Morgan Donald E et al Suggested Threshold Sound Pressure Levels for Frequency Modulated Warble Tones in the Sound Field J Speech and Hearing Disorders XLIV Feb 1979 pp 37 54 Reference Equivalent Threshold Force Levels for Audiometric Bone Vibrators ANSI Standard 3 26 1981 Royster Julia D Audiometric Evaluations for Industrial Hearing Sound and Vibration May 1985 pp 24 29 Studebaker Gerald A Clinical Masking of Air and Bone Conducted Stimuli J Speech and Hearing Disorders Vol 29 No 1 Fe
60. d hardware flow control 1761 0100 Rev B USB Overview Print Capability Remote Computer Capability Compatibility Printer Interface Data Control Interface 1761 0100 Rev B Chapter 6 Remote Options The GSI 61 remote option allows for interfacing the audiometer to an external USB printer either color or monochrome for the purpose of printing audiogram records Additionally the GSI 61 can be connected to a remote computer for managing patient records Connection to the remote computer is via a USB connection Refer to the Optional Accessories section of Chapter 2 in the GSI 61 User Manual PN 1761 0100 for print functionality capabilities The details of the Remote data stream are described in greater detail within this chapter Language Compatibility In general for a printer to be compatible it must support the print language PCL3 If a printer does not support PCL3 it is known to be incompatible Support of PCL3 print language may not guarantee that a printer is fully compatible Even for a compatible printer advanced print features may not be available Compatible Print Languages PCL3 is the native print language of the GSI 61 A number of PCL print languages are considered to be supersets of PCL3 and should be compatible if implemented strictly to the specification Rarely a printer manufacturer may deviate slightly from the PCL specification and incompatibility can occur Any time a new printer is to b
61. d to ensure against rhythmic condition 8 Score each correct response by pressing the Correct button and each wrong response by pressing the Incorrect button The SISI percent score is displayed on the status screen Modifications to the SISI test 1 Select step sizes larger than 1 dB at 20 dB SL 2 Present 1 dB increments at increasingly higher sensation levels 3 Vary step sizes from 1 dB to 5 dB at 20 dB SL in both ears 4 Present 1 dB increments at increasingly higher sensation levels to both ears 4 4 1761 0100 Rev B Chapter 4 Special Test Procedures High Frequency Testing Optional The administration of some aminoglycoside antibiotics and or chemotherapies can cause a sensory neural hearing loss typically observed in the high frequency ranges above 12 7 1 Installation of the High Frequency option is necessary for this test capability Contact GSIrepresentative for additional information 2 Install the High Frequency earphones as shown in the following figures High Frequency to Booth or High Frequency No Booth 3 Select the High Frequency audiogram display format by pressing the High Freq pushbutton on the front panel 4 Assist the patient with the placement of the High Frequency earphones 5 Proceed as with pure tone threshold testing recording the thresholds onto the audiogram High Frequency Testing Setup Diagrams TDH 50 Low Frequency Phones Sennheiser High F
62. e specified verify compatibility carefully Superset languages include PCL3 PCLA PCL5 PCL5e PCL5c and PCL6 Standard Incompatible Print Languages PCL3 GUI PCL6 Enhanced PCL XL all PostScript PictBridge and GDI languages Hardware Compatibility The remote board is USB 2 0 Slow Full speed compatible Since USB 2 0 is a superset of USB 1 x itis also compatible with those computers using USB 1 Operating System Compatibility The remote option is possible with the following operating systems Windows XP Pro Windows Vista Business Windows 7 32 or 64 bit 6 3 Grason Stadler GSI 61 CLINICAL AUDIOMETER Driver Installation and System Setup Switch Position 1 Single Dual Audiogram 2 Color B amp W 3 Unused 4 Bar Code Remote Computer GSI Suite Driver Installation is platform and operating system dependent Refer to the installation instructions on the driver media CD ROM P N 1761 0650 that corresponds to this system and its operating system For most Windows operating systems the necessary drivers will install automatically Insert the CD ROM into the PC prior to connecting the GSI 61 Once the drivers are installed the CD ROM can be removed and stored for future use or reference Print Set configuration switch S according to the desired print color and audiogram arrangement ON UP OFF DOWN R amp L Audiograms print on a common axis R amp L Audiograms print on separate axes Prints are in
63. e GSI 61 to the remote computer to transfer parameter or status information During the time that an output record is being sent and transmitted the Data Transfer indicator is displayed on the LCD panel The indication displays for a minimum of 0 5 seconds Character Number of Field Name Field Description Offset Characters Record Type E CEN 0 Tone test 1 zSpeech test 3 SISI test 4 Alternate test Ch 1 Stimulus 1 Tone 42 NB Noise 3 White Noise 4 Noise 5 Mic 6 Ext A 7 Ext 5 1 SISI 0 None Off Reserved for GSI 10 27 On with 1 dB step size 3 On with 2 dB step size 6 13 Grason Stadler GSI 61 CLINICAL AUDIOMETER Character Number of Field Name Field Description Offset Characters 5 continued 1 SISI 4 Reserved for GSI 10 5 On with 5 dB step size 1 Timing 0 None Steady 1 Reserved for the GSI 10 2 Pulsed 200 200 msec on off 1 Ch 2 Stimulus Tone NB Noise White Noise Speech Noise Mic Ext A Ext B 10 1 Transducer Ch 1 Ch 2 1 Bone Bone 2 Spk 3 4 Bone Phone 5 6 Spk 7 Bone Insert 8 Spk 0 Spk Insert Phone Bone Spk Phone Insert D Insert Bone E Insert Spk Insert Phone Insert
64. e first spondee is presented to the right ear alone through Channel 1 b Select the Interlock button and simultaneously present the second syllable of the first spondee through Channel 1 to the right ear and the first syllable of the second spondee to the left ear through Channel 2 c The second syllable of the second spondee is then presented to the left ear alone d The presentations of the spondees are alternated from ear to ear The right ear may receive the first monosyllable and the left ear receives the first monosyllable of the next pair of spondees Thus twenty presentations are right ear first and twenty presentations are left ear first e Practice word pairs should be presented to the patient before scoring begins Time gt 1 2 3 Right ear stairs Left ear down town 4 10 1761 0100 Rev B Chapter 4 Special Test Procedures Doerfler Stewart Test It is difficult to maintain consistent supra threshold responses to auditory signals in the presence of several levels of noise in the same ear Masking noise can cause confusion and interferes with the ability to judge the loudness of signals 1 Using earphones or speakers in a sound field establish a recorded binaural spondee threshold SRT Live voice Mic or recorded Ext or Ext B spondees may be routed to each ear Left Right through Channel 1 2 Raise the speech signal to SRT 5 with the Channel 1 attenuator withou
65. e the GSI 61 to a 1000 Hz pure tone introduced into the microphone When using an external source calibrate to the 1000 Hz pretest tone Talk Forward Level Control This rotary control allows the operator to adjust the intensity in a continuous range of 45 to 90 dB HL when giving the subject instructions through use of the Talk Forward function The level selected by this control is calibrated to the transducer currently being used with the subject 2 12 1761 0100 Rev B Monitor Controls 1761 0100 Rev B Chapter 2 Installation The Monitor Headphone or Speaker allows the operator to listen to the stimuli as they are presented or to listen to the patient s comments through the talk back system The Channel 1 and Channel 2 rotary controls adjust the intensity of the sound presented through the monitor headphone or speaker The Talkback rotary control adjusts the intensity of the patient s voice The Monitor Spkr pushbutton is used to turn on the Monitor Speaker When Mic is selected or when the Talk Forward is operated that channel s input to the monitor speaker is disabled to reduce acoustic feedback This Power Monitor green light emitting diode LED located in the upper left portion of the keypanel is illuminated when power is supplied to the GSI 61 2 13 Grason Stadler GSI 61 CLINICAL AUDIOMETER Displays 2 14 A Liquid Crystal Display LCD is hinged to the GSI 61 and is used to display all of the te
66. eadset or monitor speaker can be used by the tester to listen to Channel 1 Channel 2 and or Talk Back signals WxDxH 20 inches x 15 inches x 12 6 inches LCD raised 50 cmx 39 cm x 32cm Height with LCD lowered 6 inches 15 cm Weight 19 pounds 8 7 kg Shipping Weight 30 pounds 13 6kg 1761 0100 Rev B Instrument Specifications Power Consumption 90 Watts Accessories Supplied Test Headset Matched set TDH 50P 8000 0063 Bone Vibrator B71 8000 0130 Subject Response Handswitch 7874 0156 Test Microphone Monitor Headset with coiled cord 1761 9623 Talk Back Microphone 8000 0039 Patch Cords 6 ft Grey 4 each 4204 0505 Power Cord Country and voltage specific Instruction Manual English 1761 0100 Instruction Manual Spanish 1761 0104 GSI Suite Audiometic Data Management Software 1010 9600 Optional Accessories CD Player
67. earing Level And Frequency Limits 2 24 Initial Installation 2 26 Single Room Environment 2 27 Two Room Installation 2 27 Loudspeaker Installation 2 29 Contents 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER Chapter 3 Operation Chapter 4 opecial Test Procedures Chapter 5 Routine Maintenance Contents 2 Preliminary Checks 3 1 Patient Instructions 3 2 Placement of the Earphones 3 2 Placement of the Insert Phone 3 2 Placement of the Bone Vibrator 3 2 Routine Test Procedures 3 3 Threshold Determination Pure Tone Modified Hughson Westlake 3 3 Spondaic Speech Testing Speech Reception Threshold SRT 3 4 Speech Discriminat
68. ected to an external computer to transmit and receive data from this device If the option is not installed and the pushbutton is pressed the message Not Available appears Data Transfer When Remote is enabled and the Data Transfer button is pressed a data record containing the stored test data a previously selected format 15 transmitted to a remote device Data may be transferred point by point or as a complete battery of all saved test results The data transfer format is set by an authorized GSI Service Engineer If the pushbutton 15 pressed when the Remote option is not active the message Not Available is displayed Data Erase When the Data Erase pushbutton is pressed for at least 0 5 second all of the stored test data in the GSI 61 is erased and the message Erasing Data is displayed on the LCD If no data is stored in the GSI 61 memory the message Test Data Stored is displayed Contrast This rotary control is used to set the brightness of the LCD Mic Ext A and Ext B Level Controls These rotary controls are used to adjust the signal intensity from the test microphone or the external devices so that the level reflects accurately on the VU meters on the Status display These inputs are adjusted by turning the appropriate control until an indication of 0 dB on the average is obtained on the selected channel VU meter Note it has been suggested that for live voice speech testing the operator should calibrat
69. edure prescribe some time interval usually 16 hours between the high level sound exposure and the actual hearing test Instructing the Patient Try to put the patient at ease before beginning the procedure Explain to the patient How the test will be administered What he or she should be listening for explain that the sounds may be different some may be soft some loud The purpose of the test is to find the softest tone which can be heard and it is important to listen carefully Explain that he or she should respond by raising a finger or hand or by pressing the handswitch as soon as the tone is heard As soon as the tone is no longer heard the finger hand should be lowered or the handswitch should be released Inform the patient that each ear will be tested separately unless otherwise instructed Placement of the Earphones Prior to positioning the earphones on the patient s head inspect the ear canals for any blockage due to cerumen or foreign objects Recognize that soft walled ear canals may collapse under the earphones and this may lead to incorrect threshold levels Insert phones might be used in these cases Eliminate all obstructions such as glasses hair or hearing aid between the earphone and the patient Center the earphone over both ears and adjust the headband so that it rests solidly on the crown of the head and exerts pressure on both ears Place the earphone with the red connector over the patient s right ear
70. endently of each other When the Interrupt is in the off position the corresponding channel is activated by depressing the Tone bar bar and deactivated by releasing the Tone bar To turn on the Interrupt press the pushbutton When Interrupt is in the on position the corresponding channel is deactivated by pressing the Tone bar and activated by releasing the bar When Interrupt active an icon is displayed on the LCD Note that in the ALTernate test mode the Interrupt pushbuttons do not operate independently of each other 2 8 1761 0100 Rev B Interlock Tracking Frequency Up Down Talk Forward 1761 0100 Rev B Chapter 2 Installation This pushbutton locks both tone bars together so that operating one channel will also operate the other according to the status of the Interrupt buttons To unlock the Tone bars press the Interlock button again When the Interlock is active a message is displayed on the LCD This pushbutton when pressed saves the current dB HL level representing the threshold level and effective masking level if selected transducers and routing In the Display Audiogram format the appropriate symbol appears for each Save press This pushbutton allows the Channel 2 hearing level to track the Channel 1 hearing level by a selected dB difference When in Tracking any dB change to the Channel 1 HL causes the Channel 2 HL to change by the same amount until the limit of the Channel 1 transducer is reached
71. hbutton During tone tests excluding ALTernate SISI the Scorer Timer pushbuttons may be used to start clear and stop the timer The timer is displayed in the test status area of the Status screen When the timer is first selected it initializes to 0 00 0 minutes 00 seconds The timer starts when the Start pushbutton is pressed Times up to 199 minutes and 59 seconds may be displayed before the timer resets to 0 00 The timer may be halted at any point by pressing the Stop pushbutton The stopped time 15 displayed Upon pressing the Start pushbutton after the Stop pushbutton timing is resumed from the currently displayed value Pressing Clear while the timer is running is invalid Pressing Clear after Stop resets the timer to 0 00 These pushbuttons are used to select the format for the screen display format on the LCD Display Status When the Display Status pushbutton is pressed the display is formatted as shown in the following Figure Front Panel Display Status This display indicates the current instrument state and VU meters Stimulus Tone SISI Stimulus Noise Transdacer 3 Step Transducer Phone Routing Right Interloak Routing Left Interrupt Display Status Display Audiogram When the Display Audiogram pushbutton is pressed the display is formatted as shown in the following Figure Front Panel Display Audiogram Two audiograms with the standard range of frequencies 125 Hz to 12 000 Hz
72. he GSI 61 can be installed in a single room environment or as part of a two room sulte Excessive noise in the test environment such as that produced by conversation typewriters printers or other machines reduces test validity because it tends to mask the test signals particularly at the lower frequencies where earphone cushions provide less effective attenuation A room that attenuates sound may be required if ambient noise at the patient s ears reaches levels sufficient to cause apparent hearing loss at the lower frequencies Maximum permissible test environment sound pressure levels are specified by American National Standard Criteria for Permissible Background Noise during Audiometric Testing Section 3 1 The following table shows the maximum background levels that can be present inside the room while a valid hearing test 1s being conducted These values apply for hearing threshold measurements to 0 dB HL Maximum Ambient Noise 125 250 500 750 1000 1500 2000 3000 4000 6000 8000 Test Room level max dB SPL ears covered 29 0 17 5 14 5 16 5 21 5 21 5 level dB SPL ears not covered 23 0 13 5 9 5 7 5 9 0 5 5 Notes Maximum permissible 1 3 octave band level If the Hearing Level to be measured is 10 dB HL then 10 dB should be subtracted from the levels listed in this table Note room providing sound isolation from ambient noise is highly recommended so that hearing threshold values may be obtained
73. he signals to be of equal loudness Repeat the above procedure increasing the intensity of the tone for the channel routed to the reference ear by 20 dB each time until an intensity of 80 to 90 dB is reached Identify the dB HL of the tone necessary to balance in loudness the tone in the reference ear at each level This procedure is followed for each frequency to be balance tested 1761 0100 Rev B Chapter 4 Special Test Procedures Monaural Loudness Balance MLB Test 1761 0100 Rev B A comparison of perceived loudness growth is made between two different frequencies on the same ear The frequency where the best hearing is detected is used as the reference frequency for the comparison of perceived loudness with tones at the impaired frequency There should be a difference of at least 25 dB between thresholds at each frequency tested The output tone is routed to a single earphone Right or Left The procedure is essentially the same as the ABLB test The signal is manually alternated from frequency to frequency The reference frequency is increased in intensity in 20 dB steps above threshold Instruct the patient to indicate when the two frequencies appear to be equal in loudness The level at which the loudness of the test frequency balances the loudness of the reference frequency is recorded 4 3 Grason Stadler GSI 61 CLINICAL AUDIOMETER Short Increment Sensitivity Index SISI Patients exhibiting cochlear path
74. heck This check must be performed in a quiet environment or in a sound room With the frequency Hz set to 2000 Hz the Channel 1 HL set at 40 dB HL and the bone vibrator positioned properly the tone should be clearly audible to a person with normal hearing less than 25 dB When a bone vibrator fails this test the calibration should be verified If the bone vibrator cannot be calibrated to specifications it should be replaced Masking Level Check Select the Tone test type Activate the Channel 2 Interrupt button so that it is on Listen for a smooth even hiss with the Channel 2 Hearing Level control set at 50 dB HL Talk Forward Check Speech should be clearly audible in the earphones when spoken in a normal tone with the Talk Forward dB HL control set at 45 dB HL 1761 0100 Rev B Chapter 5 Routine Maintenance Calibration Reference Levels 1761 0100 Rev Itis recommended that each GSI 61 receive a thorough calibration certification once a year If periodic checks are also desired the tables in this section provide the SPL values per frequency for each transducer If the measured values are not within 5 dB at 125 6000 8000 12 000 Hz in the earphones the GSI 61 should be scheduled for immediate maintenance Sound Pressure Levels for Pure Tones with TDH 50PEarphones SPL values with TSH 50P earphones for 70 dB HL setting 125 250 500 750 117 5 96 5 83 5 78 5 77 5 77 5 81 0 79 5 80 5 83 5 83 0 87 5 90 0 115
75. hecks described below may point to the source of some instrument problems If they do not the instrument should receive technical service before further use The checks should be made at periodic intervals even if biologic checks reveal no problems Earphone and Bone Vibrator Cords With extended use earphone and bone vibrator cords tend to fray internally at the connectors This fraying can decrease or increase the signal level or an intermittent signal as the cord is flexed To check for either condition turn on the GSI 61 Set the HL to a comfortably audible level Activate both Interrupt buttons to ON Bend the cord next to the plug at both ends of each earphone Listen for an intermittent signal abrupt changes in the signal level or a scratchy sound that coincides with the flexing of the cord The presence of any of these conditions signifies that the cord should be replaced Repeat the test for the other earphone the bone vibrator and the insert phones Hum and Noise With the GSI 61 initialized to Tone test type and the Channel 1 Interrupt button in the ON mode turn the Channel 1 Hearing Level control from 0 to 60 dB HL Listen for low frequency hum 60 or 120 Hz and any other noise hiss or low rushing sound at all attenuator levels through the earphone Some audible noise at levels above 70 dB is permissible If these noises are detected below 70 dB the audiometer should be schedule for maintenance Repeat this procedure with the
76. hold in the sound field room with the patient wearing the hearing aid to be evaluated The attenuator for the channel routed to the aided ear should be set to 40 dB HL comfort setting Instruct the patient to turn up the volume of the hearing aid until the tester s voice is comfortably loud Hearing aid volume should remain at this setting throughout the test Present spondees beginning at the 40 dB setting and attenuating the intensity until the aided threshold is reached The aided discrimination score can then be obtained by initially setting the intensity to 30 to 40 dB above the aided threshold The hearing aid s volume should be set for a 40 dB HL speech input Obtain aided measurement of discomfort or tolerance limits with the same gain control setting The measurement of efficiency in noise can be determined a Setthe hearing aid gain for a 50 dB HL speech input level b Present word discrimination material at 50 dB HL through Channel 1 to the aided test ear c Route speech or white noise to the aided test ear through Channel 2 d Increase the noise gradually until the words can no longer be repeated Continue comparative tests with each hearing aid in evaluation 4 7 Grason Stadler GSI 61 CLINICAL AUDIOMETER Tone Decay Test Patients with retrocochlear pathology of the eighth nerve exhibit a rapid abnormal auditory adaption or a temporary threshold drift in response to a continuous pure tone present
77. iddle frequency band simulating the average spectrum of conversational speech Speech noise is calibrated in effective masking level and consists of equal energy per frequency from 250 to 100 Hz with a 12 dB octave roll off from 1000 to 6000 Hz The maximum dB HL for speech noise is equal to the maximum HL for the speech type signals in each transducer White Noise This pushbutton selects White Noise White noise is a broad band signal containing acoustic energy at all frequencies between 125 Hz and 12000 Hz White noise is calibrated for pure tone effective masking if a tone type signal is selected on the opposite channel and for speech effective masking if a speech type signalis selected on the opposite channel The maximum HL for white noise selected with a tone signal is 35 dB below the maximum pure tone level The maximum HL for white noise selected with a speech signal is equal to the maximum HL for the speech signal Refer to the following table for the stimuli compatibilities listing 1761 0100 Rev B 2 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER Valid Stimuli Combinations Channel 1 Stimulus ali i i i om bot channels then alid ali alid nvalid alid calibrations made to speech _ If White Noise is selected on Channel 2 one channel only calibration We we wu we _ M opposite channel sw ee e
78. igh Performance Speaker Sound Field System 102 dB HL with Booster Amplifier Frequency Range 125 to 8 000 Hz 2 29 2 30 Grason Stadler GSI 61 CLINICAL AUDIOMETER Blank page 1761 0100 Rev B Chapter 3 Operation Preliminary Checks Before starting any procedures using the GSI 61 Clinical Audiometer ensure that the power cord is plugged in a properly grounded receptacle Check also that all cords from the transducers handswitch 1f used and printer fit securely in their receptacles on the rear and side panels If speech testing with recorded voice is to be performed check that the CD or tape unit 1s connected and operating properly Turn on the GSI 61 and allow it to warm up for 10 minutes C AUTION Handle earphones bone vibrator and insert earphones with care Do not drop them nor allow them to be banged together Severe mechanical shock can alter their operating characteristics which may require that the transducers be replaced 1761 0100 Rev B T Grason Stadler GSI 61 CLINICAL AUDIOMETER Patient Instructions 3 2 Noise Recovery Period Exposure to high levels of sound unmuffled lawn mowers many power tools motorcycles rock music gunfire tends to create a temporary threshold shift TTS which diminishes with time after exposure Any patient tested soon after such exposure will manifest a hearing loss that does not accurately reflect the normal hearing threshold It is important that the testing proc
79. imits Hz Center Frequency Hz Upper Limits Hz 125 105 111 140 149 250 210 223 261 297 500 420 445 561 595 750 641 668 842 892 1000 841 891 1120 1190 1500 1260 1340 1680 1780 2000 1680 1780 2240 2380 3000 2520 2670 3370 3570 4000 3360 3560 4490 4760 6000 5050 5350 6730 7140 8000 6730 7130 8980 9510 12000 10092 10570 13500 14275 Due to the limitations of the existing couplers and artificial ears acoustic measurements not required Bandwidth for Narrow Band Masking Sounds High Frequency Pass Band Upper and Lower Frequency Limits at 3 dB Points Lower Limits Hz Center Frequency Hz Upper Limits Hz 8000 6730 7130 8980 9510 9000 7570 8020 10100 10700 10000 8410 8910 11220 11890 11200 9420 9980 12570 13320 12500 10510 11140 14030 14870 14000 11770 12470 15710 16650 16000 13450 14250 17960 19030 18000 15138 16042 20196 21413 20000 16820 17815 22440 23792 Bone Vibrator B71 Calibration Values for Non occluded Test Ear Mastoid Placement ANSI 3 43 and ISO 7566 250 500 750 1000 1500 2000 3000 4000 6000 8000 Speech dB re 1 N non occluded ear Tentative Notes These values were obtained with 30 to 35 dB effective masking by air conduction to the non test ear The above values apply for the mastoid position using the Bruel and Kjaer type 4930 artificial mastoid having manufacturer s serial numbers of 526226 or higher and type B71 bone vibrators used with a P 3333 headband These
80. ion PB Words 3 4 Alternate Binaural Loudness Balance ABLB or Fowler Test 4 2 Monaural Loudness Balance MLB Test 4 3 Short Increment Sensitivity Index SISI 4 4 Modifications to the SISI test 4 4 High Frequency Testing Optional 4 5 High Frequency Testing Setup Diagrams 4 5 Sensorineural Acuity Level SAL Test 4 6 Hearing Aid Evaluation 4 6 Tone Decay Test 4 8 Lombard or Voice Reflex Test 4 8 Delayed Auditory Feedback DAF 4 9 Staggered Spondaic Word Test SSW 4 10 Doerfler Stewart Test 4 1 Modified Doerfler Stewart Test 4 1
81. is reading 15 tape recorded and timed with the timer The patient is asked to repeat the reading while the recording of the speaker s voice is routed to the selected transducer with a delay of 0 1 to 0 2 seconds Note A three head tape recorder with the appropriate delay capabilities is required The intensity of the signal controlled by the attenuators is first set to 0 dB HL and raised 10 dB after each reading is complete until a positive result 1s seen Each reading is timed with the timer A change in the reading rate 3 to 5 seconds an increase in the vocal intensity or a stuttering effect indicate that the auditory feedback was heard 4 9 Grason Stadler GSI 61 CLINICAL AUDIOMETER Staggered Spondaic Word Test SSW 1 Using earphones or speakers in a sound field and an external source of speech establish the patient s speech threshold relative to the three frequency pure tone average for each ear 2 Setthe intensity level of the signal for the Channel 1 and Channel 2 attenuators to 50 dB SL This level may be adjusted for severe hearing loss or tolerance problems A presentation level of 30 dB SL is suggested when air bone gaps exceed 20 dB J Katz and E White unpublished 3 Forty spondaic words recorded on an external source are presented to the patient in partially overlapping pairs The patient is asked to repeat both spondees a With Channel 1 routed right and Channel 2 routed left the first syllable of th
82. itch fuse drawer and voltage selection switch and power cord with hospital grade plug appropriate for the country of destination When turned ON the GSI 61 automatically initializes and displays a screen which states the type of audiometer IEC and ANSI specified for speech audiometry followed by a status screen With the status display the GSI 61 is brought to the initialization state The frequency is set at 1000 Hz and Channel 1 Channel 2 Steady tone NB Noise Phone Right Phone Left 0 dB HL 10 dB HL Right Side Serial Port Panel This instrument has Remote and Printing capability or the following connectors will be visible on the right side panel of the GSI61 _ Please Note Depending on the date product configuration purchased the GSI 61 is either equipped with a Serial Port a USB Port or no Remote port at all Remote Port Remote Printer Option RS 232 Remote Port A mini DIN connector uses a standard Apple Hayes Modem cable supplied to provide serial connection to the equipment USB Remote Port A Standard A B USB cable provides connection to a PC Printer Port A 25 pin PC Printer Interface Connector Connects to the printer via a standard PC parallel printer cable USB Printer Port A Standard USB cable provides connection to a printer See Chapter 6 for more DIP Switches For more detail on these DIP switch settings and attaching and using a printer refer to the Optional Accessories
83. m 43 Skin 44 East 45 Thing 46 Dad 47 Up 48 Bells 49 Wire 50 Ache Appendix 1 1 Yore Your Bin Way Weigh Chest Then Ease Smart Gave Pew 10 Ice 11 Odd 12 Knee 13 Move Add Ad West Cute Start Ears Tan Nest 9 Say 10 Is 11 Out 12 Lie Lye 13 Three A cL M IY Doc All Awl Wood Would At Where Chin They Dolls Sew 9 Nuts 10 Ought Aught 11 In Inn 12 Net 13 My Grason Stadler GSI 61 CLINICAL AUDIOMETER 14 15 16 17 18 19 20 21 224 23 14 15 16 17 18 19 20 21 22 29 24 29 26 14 15 16 I 18 19 20 21 29 29 24 26 Now Jaw One Won Hit Send Else Tare Tear Does To Two Too Cap 24 23 26 With Air Heir And Oil King Pie He Smooth Farm This Done Dunn Use Yews Camp Wool re Aim Leave Of Hang Save Ear Tea Tee Cook Tin Bread Bred Why Arm Yet Darn List 2A 27 Young 28 Cars 29 Tree 30 Dumb 3 That 32 Die Dye 33 Show 34 Hurt 35 Own 36 Key 37 Oak 38 New Knew 39 Live verb List 3A 27 When 28 Book 29 Tie 30 So 31 Hand 32 End 33 Shove 34 Have 35 Owes 36 Jar 37 No Know 38 May 39 Knit List 4A 27 28 29 30 31 92 33 34 35 36 37 38 39 Art Will
84. monitor headset to the rear panel 2 17 Grason Stadler GSI 61 CLINICAL AUDIOMETER Optional ccessories E A RTONE Insert Earphone Set Single Insert Phone Printer There are two insert earphones options available for use with the GSI 1 The first option is the paired Insert Earphone Set which allows for the use of these insert phones in addition to the TDH 50P earphones The phones are connected to the panel on the rear of the GSI 61 in the position labeled Insert Left and Insert Right The use of these insert earphones is recommended in order to minimize collapsing of the ear canals while reducing the occlusion effect seen in bone conduction testing when the ear is covered Insert phones are ideal for hearing aid evaluations where they can used to accurately simulate situations for speech testing of hearing aided patients Noise exclusion is improved at low frequencies where background noise may be a problem These insert phones may be used with tone 125 Hz to 8000 Hz speech and noise signals The second insert phone option is a single phone This insert may be used with tone 250 Hz to 6000 Hz speech and noise signals Note When the single insert option is used the insert phone is connected to the rear of the GSI 61 at the Insert Left position An optional color or black and white printer may be attached to the GSI61 to allow printing of the audiometric test results This option may be
85. n 10 dB HL to 105 dB HL Bone Conduction Mastoid 10 dB HL to 65 dB HL Forehead 10 dB HL to 55 dB HL Sound Field 10 dB HL to 90 dB HL Paired Inserts gt 10 dB HL to 95 dB HL Single Insert 10 dB HL to 95 dB HL Masking Intensity Range Speech Noise Air Conduction TDH 50P and Insert Phones and Bone Conduction Maximum dB HL are the same as the speech type signals Sound Field 10 dB HL to 80 dB HL White Noise Equal to Speech Noise Optional Accessories Steady Tone continuously present Pulsed Tone pulsed 200 mSec ON 200 msec OFF Tone modulated 5 of center frequency at a rate of 5 Hz ALT Tone alternating between Channel 1 and Channel 2 Channel 1 is 400 mSec ON 400 mSec OFF followed by Channel 2 400 mSec ON 400 mSec OFF SISI An intensity increment is added to a tone in the selected channel for 200 mSec every 5 seconds The HL increments are available in 1 2 or 5 dB steps High Frequency Tone testing in the frequency range of 8 kHz to 20 KHz using High Frequency phones or Sound Field The frequencies available for testing are 8 KHz 9 kHz 10 kHz 11 2 kHz 12 5 kHz I4 kHz 16 kHz 18 kHz and 20 kHz Optional Talk Forward Permits the tester to speak through the test microphone into the selected transducer at the intensity level set by the front panel controls Talk Back Allows the tester to listen to comments from the subject in the testing booth Monitor The monitor h
86. n a clearly typed paragraph to read aloud into the talk back microphone Put on the monitor headphones monitor speaker may also be selected Adjust Channel and Talk back monitor knobs to appropriate levels Select Speech Noise as the input signal on Channel 1 Routing should be Left Right The output is presented through the earphones or sound field speakers Channel 2 is not active during this test Signal to the patient to begin reading With the Channel 1 attenuator set to an intensity of 0 dB HL gradually increase the intensity of the noise level Note the level of masking at which the patient s voice becomes more intense and compare this level with the degree of supposed patient hearing loss 1761 0100 Rev B Chapter 4 Special Test Procedures Delayed Auditory Feedback DAF 1761 0100 Rev B If a person s voice is recorded and played back with a delay of 0 1 to 0 2 seconds the auditory feedback causes the speaker to slow down or alter his speech in a stuttering manner The patient is given a clearly typed text to read which can be completed in 30 to 60 seconds Using patient earphones or sound field speakers the test may be performed by routing the stimulus Ext A to both ears Left Right and with or without Speech Noise to the non test ear The Examiner uses the same monitoring procedure described in Step 2 of the Lombard test The patient is placed before the talk back microphone and asked to read the text H
87. ne Right 0 dB HL 1000 Hz Channel 1 and Narrow Band Noise Phone Left 10 dB HL Channel 2 h Test all of the input and output transducers to verify that the signals and communication functions are operating properly 2 28 1761 0100 Rev B 1761 0100 Chapter 2 Installation Loudspeaker Installation The installation of the Basic Speakers 1761 9630 with the GSI 61 provides a guaranteed maximum level in speech of 90 dB HL with a 6 ft x 6 ft room and the patient seated one meter from the speakers Note that the High Frequency with Sound Field can only be selected with Basic Speaker 90 dB HL the Basic Speakers Basic Speaker 90 dB HL Sound Field System 90 dB HL Basic Speakers and Cable Frequency Range 125 to 16 000 Hz To obtain a maximum level in speech of 96 dB HL the High Performance Speakers 1761 9635 may be used High Performance Speaker 96 dB HL High Performance Speaker 96 dB HL Sound Field System 96 dB HL High Performance Speakers and Cable Frequency Range 125 to 8 000 Hz For additional output capability to 102 dB HL guaranteed maximum level in speech use the High Performance Sound Field System with Booster Amplifier 1761 9639 as shown below Note The Booster amplifier can only be used with the High Performance speakers Use of the Booster Amplifier with the basic speakers will can damage the speakers Cables High Performance Booster Speaker Amplifier 145 Watts H
88. nt the standardized PB word list W 22 Appendix 1 in this guide Present the words at a level comfortable to the patient at least 30 dB and generally 35 to 50 dB above the 1000 Hz pure tone threshold Using the scorer buttons on the front panel press the Correct button each time the right response is given and the Incorrect button each time a wrong response is given C The Discrimination Score is the percentage of words repeated correctly Discrimination 96 at HL 100 x Number of Correct Responses Number of Trials 324 1761 0100 Chapter 4 Special Test Procedures This section describes some special test procedures that can be used with the GSI 61 Clinical Audiometer The flexibility of the GSI 61 allows for preference choices in test setup and operations The operator makes the channel routing transducer and presentation mode selections which are appropriate to the test requirements The Interrupt pushbutton may be selected for continuous and automatic stimulus presentations or the tone bar may be pressed for manual presentation Channel 1 and Channel 2 may be interlocked for simultaneous presentations or operated independently Each channel can be routed Right Left or Left Right 1761 0100 Rev B 4 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER Alternate Binaural Loudness Balance ABLB or Fowler Test 10 4 2 The perceived growth of loudness of a suprathreshold tone in an impaired ear may differ from
89. nter octave frequencies 1 750 Hz 1500 Hz 3000 Hz and 6000 Hz Record these settings by pressing the Save pushbutton with each threshold level C Repeat this procedure with the other ear d Determine if masking should be used The use of masking in the contralateral ear non test ear is indicated if there is a difference in threshold between the two ears of approximately 35 dB or more If necessary repeat the testing with masking and again record the testing process Spondaic Speech Testing Speech Reception Threshold SRT a Instruct the patient that he or she will be hearing words that have two parts such as mushroom or baseball The patient should repeat the words and if not sure he or she should not be afraid to guess D Using either live voice or recorded speech present the standardized word lists W 1 and W 2 Appendix 1 in the guide testing the better ear first Start 20 dB above the 1000 Hz pure tone threshold level Present one word on the list and if the response is correct lower the level by 2 dB Continue until the patient has difficulty with the words When this occurs present more words for each 2 dB step C Speech Reception Threshold SRT is recorded at 2 dB above the level at which the patient cannot repeat any words correctly Speech Discrimination PB Words a Instruct the patient that he or she is to repeat the words presented D Using either live voice or recorded speech prese
90. ocol adds the features provided by the GSI 61 such as the ability to transmit complete audiogram information with a single push of the Data Transmit button and High Frequency audiometry Operation The GSI 61 Data Transfer option functions in all operative test modes of the audiometer software link is enabled by pressing the Remote button on the instrument s front panel a message to this effect can be observed on the LCD display The link is disabled by depressing the Remote button again Note that the word Remote will be erased The Remote indicator must be displayed in order for the transfer of information to occur Actual data capture and transfer occurs when the Data Transfer button on the front panel is pressed When the Data Transfer button is pressed all pertinent unit switch settings and display information is internally buffered by the GSI 61 for transmission through the serial interface to an external computer During the period of data capture and to the end of transmission of the data record Data Transfer is displayed on the LCD panel activation will be 0 5 seconds minimum The GSI 61 is configured as a DCE Data Communications Equipment device and would normally connect to a remote device configured as a DTE Data Terminal Equipment device Hardware handshaking RTS CTS and software handshaking xon xoff are provided to control data flow RS 232 Configuration The RS 232 configuration of the GSI61 Remote inte
91. ology are better able to detect small increments in intensity at low sensation levels than normally hearing subjects or subjects with pathologies located elsewhere in the auditory system A continuous tone is presented to the test ear at 20 dB SL Every five seconds a selected increment in intensity 1s introduced to the continuously presented tone for a duration of 200 msec 1 Using earphones establish the threshold of the test ear for the selected frequency 2 Carefully instruct the patient prior to testing that a faint but steady sound will be heard and a small jump in loudness may occasionally occur The patient is instructed to respond each time he is certain that the jump is heard 3 Press the SISI button and the desired dB Step size 4 Select Tone or FM and route the stimulus to the test ear through Channel 1 Right or Left Set the intensity for Channel 1 to 20 dB above threshold Masking noise may be routed to the contralateral ear through Channel 2 5 Press the Interrupt button for Channel 1 and Channel 2 if masking is being used 6 Familiarize the patient with responding to noticeable increments in intensity by providing practice trials selecting each available dB step 5 dB 2 dB or 1 dB 7 Present twenty 1 dB increments with the patient responding each time an increment is detected After the fifth tenth and fifteenth presentations the increment can be omitted or raised to 5 dB as a check for validity of the response an
92. ontrol its functions Input Record Type 1 to 4 Reserved for the 65110 Input Record Type 5 Pushbutton Code Record This record type provides the ability to remotely simulate the operation of all user controls The record specifies the control operation using a function code which defines the group of controls and a sub function code which defines the specific parameter to select of the function to perform Control operations are processed in the same manner as if they had been manually entered parameter or functional defaults and restrictions will still apply 6 7 Grason Stadler GSI 61 CLINICAL AUDIOMETER Function Function Group Function Sub Code Pushbutton Code Subgroup Function Channel 1 Stimulus Tone NB Noise White Noise Speech Noise Mic ExtA ExtB Channel 2 Stimulus Tone NB Noise White Noise Speech Noise Mic ExtA ExtB Transducer Combinations Channel 1 Channel 2 Bone Bone Spk Spk Spk Phone Bone Phone Phone Phone Phone Bone Phone Spk Phone Insert Bone Spk Bone Insert Spk Bone Spk Insert Insert Phone Insert Bone Insert Spk Insert Insert Output Routing Channel 1 Channel 2 Combinations Left Right Right Left Left Left Right Right Left Right Left Right 6 8 1761 0100 Rev B Chapter 6 Remote Options Function Function Group Function Sub Code Pushbutton Code Subgroup Function 12 Reserved for GSI 10 13 Reserved for GSI 10 Reserved for GSI 10 Reserved for GSI 10 14 5 1
93. ote device is performed by sending and receiving information in records Each type of information has its own record format Each record is divided into fields which contain specific information records are formatted with a predefined fixed length format The generic format for all records 15 Record Prefix Record Type Data Fields Checksum Record Terminator 66499 The record prefix consists of a character and denotes the start of a record Input records do not contain a checksum The record terminator consists of a LF sequence Each record consists of fixed length data fields with any unused or Zero data fields filled with a 0 records consist of a sequence of printable ASCII characters from the set of 0 to 9 A to G t _ CR and LF All multiple character ASCH fields will be right justified with unused character positions filled with _ characters Positive numeric values will not contain a sign this will be implied Negative values contain a sign in any character position to the left of the most significant digit 1f the number Unless specified the decimal point for non integer numbers will not be included in the character sequence Checksums Checksums will be calculated so as to maintain compatibility with the GSI 16 as the mod 256 sum of all preceding characters on the record including the prefix and stored as two
94. ow the SISI increments to be presented every 5 seconds Press the Interrupt button a second time to terminate the SISI presentation Operating the Channel 2 tone bar with Interlock selected in SISI also terminates the SISI increment presentation In order to deselect the preselected signal format change to any non compatible test stimulus or push the same signal format again The following table illustrates the compatibilities of test stimulus and signal formats VALID SIGNAL FORMATS STIMULUS COMBINATIONS V zValid combination of signal format and stimulus X Invalid combination of signal format and stimulus When White White is selected stimulus calibration for White noise will be for speech 1761 0100 Rev B Chapter 2 Installation Stimulus Channel 1 Tone The Tone pushbutton allows the selection of a pure tone presentation for and Channel 2 air bone conduction testing with the choice of four transducer types Phone both the standard TDH 50P and the optional High Frequency earphones Bone Speaker or Insert When Tone is selected Narrow Band Noise automatically routes to the opposite channel if the stimulus type on the opposite channel is not compatible with Tone Note that the selection of Tone on one channel and Mic on the opposite channel is a valid combination This setting allows the operator to have contact with the patient especially a young child without the need to select Talk Forward Mic The Mic pu
95. r less 1 4 inch monaural jack 1761 0100 Rev B Chapter 2 Installation Insert Phone Outputs Monaural phone jacks for left and right insert phones or patch cords Voltage to 4 0 V Output impedance 5 ohms or less Note When the Single Insert Phone option is used it must be plugged into the left insert phone output R6 Bone Vibrator 1 4 inch phone jack Jack for bone vibrator or gray patch cord Voltage 200 u V to 5 00 V RMS Output impedance 5 ohms or less R7 Subject 1 4 inch phone jack Response Handswitch Accepts plug from the cable attached to the patient s response handswitch or handswitch patch cord Pin Function Voltage Impedance 1 Shield GND ohm 2 Digital GND GND 0 ohm 3 Response input 5V GND ohm 0 ohm R8 CD Player Power 2 pin power jack Jack Provides 5 V DC for CD Player R9 Dip Switch Cal An eighth position bank of switches accessible by an authorized service representative Switch R10 Speakers 5 pin Din connector Located on rear of instrument Connects to left and right loudspeakers Pin Function Impedance 1 Left speaker high 1 0 ohm 2 Left GND 0 ohm 3 Right speaker high 1 0 ohm 4 Left speaker low 1 0 ohm 5 Right speaker low 1 0 ohm SHLD Right GND 0 ohm 1761 0100 Rev B 2 3 Grason Stadler GSI 61 CLINICAL AUDIOMETER Left Side The connectors on the left side panel are shown below Panel The power entry module is composed of the power sw
96. requency Phones High Frequency No Booth TDH 50 Low Frequency Phones Sennheiser High Frequency Phones O UJ o mE a gt e High Frequency to Booth 1761 0100 Rev B 4 5 Grason Stadler GSI 61 CLINICAL AUDIOMETER Sensorineural Acuity Level SAL Test A modification of the Rainville Method A procedure for the measurement of sensorineural sensitivity comparing threshold shifts produced by bone conducted masking noise in normal hearing subjects and in patients This narrow band masking allows for a noise intensity signal necessary to achieve the desirable greater threshold shifts at lower frequencies Assist the patient with earphone or insert phone placement and with positioning the bone vibrator on the forehead Using Channel 1 with Phone and Tone selected establish the patient s air conduction thresholds in each ear for each frequency to be tested Frequencies between 250 and 4000 Hz are suggested as the most useful for the purposes of this test Using Channel 2 select Bone and Narrow Band Noise Determine air conduction thresholds again for each ear in the presence of bone conducted noise Determine the patient s threshold shift caused by noise The sensorineural loss at each frequency is the difference between the patient s threshold produced with the noise and the amount of shift normal hearing adults experience under the same conditions Hearing Aid Evaluation 4
97. requency earphones see the figures on page 2 23 Plug the power cord into a grounded outlet d Turn the unit on and observe that the GSI 61 is receiving power The small Monitor Power LED on the front panel is illuminated The unit is initialized to Tone Phone Right 0 dB HL 1000 Hz Channel 1 and Narrow Band Noise Phone Left 10 dB HL Channel 2 e Test all of the input and output transducers that will be used during testing to verify that the signals and communication functions are operating properly O Two Room Installation Place the GSI 61 on a desk or table where it will be used The location should be near a grounded electrical outlet which is needed to accommodate the GSI 61 power cord Allow a minimum of 2 inches of clearance around the GSI 61 for heat dissipation a Connect the patient response handswitch the headset bone vibrator and optional insert phone s to the connector panel on the inside of the sound room b Mount the Talkback microphone in the sound room using the hardware provided The microphone is usually mounted just above the window frame Pass the microphone plug through the grommet hole in the jack panel and connect directly to the talk back microphone jack on the GSI 61 rear panel R3 1761 0100 Rev B xs Grason Stadler GSI 61 CLINICAL AUDIOMETER Do not use a patch cord with the Talkback microphone as interference can occur Use the supplied patch cords to connect the GSI 61 output jacks
98. rface must be set to match the interface configuration of the computer This configuration is set by the Grason Stadler service representative during installation A dip switch S1 is provided on the serial interface board to configure the interface for baud rate parity and number of data bits number of stop bits and data flow control this switch 1s inside the GSI 61 and is not accessible by the user These settings are read on power up and the hardware is initialized appropriately 1761 0100 Rev B 6 1 Grason Stadler GSI 61 CLINICAL AUDIOMETER Baud rate Parity Data Bits Data Flow Control Stop Bits 6 2 The configuration is selected as follows OFF Logical 1 ON Logical 0 Position ff 3 2 1 Selection OFF OFF OFF 9600 Baud GSI 16 compatible OFF OFF ON 4800 GSI 16 compatible OFF ON OFF 2400 GSI 16 compatible OFF ON ON 1200 GSI 16 compatible ON OFF OFF 600 GSI 16 compatible ON OFF ON 19 2 ON OFF Invalid Selection ON Invalid Selection Position 5 4 Selection OFF OFF No Parity 8 Data Bits OFF Odd Parity 7 Data Bits ON OFF Even Parity 7 Data Bits GSI 16 compatible ON ON Space Parity 7 Data Bits Position 6 OFF Hardware flow control used GSI 16 compatible ON Software Flow control used Position 7 OFF 1 Stop bit ON 2 Stop bits GSI 16 compatible Position 8 This position is not used The default settings are 9600 baud no parity 8 data bits 1 stop bit an
99. rinter Response If communications problems occur during the course of printing this error message will be flashed Communications Error Messages The following communication errors may occur during data transmission through the RS 232 communications Comm error parity Check GSI 61 and PC parity settings Comm error framing Check GSI 61 and PC selections for number of stop bits and number of bits per command Comm error overrun See framing Comm error multiple Check parity baud rate number of stop bits and byte size on GSI 61 Comm error spurious Soft error Should not be repeatable if so problem could be anywhere in GSI 61 digital circuits or PC s communication circuits Comm error break See spurious If the word Help followed by an error code is displayed note the Help Code number See the GSI 61 Service Manual 1761 0110 for detailed descriptions of these Turn off the power to the GSI61 and wait 30 seconds Restart the instrument Often the error will be cleared by this action If the error persists contact an authorized Grason Stadler service representative 1761 0100 Rev B ul Warranty 1761 0100 Rev B We Grason Stadler warrant that this product is free from defects in material and workmanship and when properly installed and used will perform in accordance with applicable specifications If within one year after original shipment it is found not to meet this standard it will be repaired or
100. section beginning on page 2 18 2 4 1761 0100 Rev B Chapter 2 Installation Front Panel Controls The controls on the front panel of the GSI 61 are shown below Attenuators The GSI 61 contains two independent HL rotary controls for test signal and masking HL Controls intensity level control with a range of 10 dB HL to 120 dB HL If the High Frequency Channel 1 option using Sennheiser earphones is installed and active the High Frequency intensity and Channel 2 level control ranges from 20 dB HL to 110 dB HL Maximum dB HL values apply to the mid frequencies with earphones only Refer to the specific transducer for dB HL limits in the Table on page 2 24 dB Step Size These pushbuttons allow the operator to change the intensity step size to 1 0 2 0 or 5 0 dB When the GSI 61 is powered up the dB step size is automatically set to the default of 5 dB increments These pushbuttons are also used to select the intensity increase when testing in the SISI mode 1761 0100 Rev B 2 5 Grason Stadler GSI 61 CLINICAL AUDIOMETER Signal Format Selectors 2 6 Frequency Modulation or Warble Tone This pushbutton enables pure tones to be warbled at rate of 5 Hz with 5 allowable deviation around the selected center frequency FM is available in all pure tone test modes including SISI Pulsed ALT and High Frequency optional Pulsed This pushbutton causes the tone to be pulsed at the rate of 200 msec ON 20
101. shbutton provides input capability from the test microphone for live voice testing with the choice of four transducer types Phone Bone Speaker or Insert When Mic is selected Speech Noise automatically routes to the opposite channel if the stimulus type on the opposite channel is not compatible with MIC Note that the selection of Mic on one channel and Tone on the opposite channel is a valid combination This setting allows the operator to have contact with the patient especially a young child without the need to select Talk Forward Ext A Ext B External A and External B accept recorded speech material from an optional compact disc player a two channel tape cassette or a reel to reel tape recorder When Ext A or Ext B is selected on one channel Speech Noise automatically routes to the opposite channel if the stimulus type on the opposite channel is not compatible with Ext A or Ext B Note that the selection of Ext A or Ext B on one channel and Tone on the opposite channel is a valid combination Narrow Band Noise The NB Noise pushbutton selects narrow band noise This is a noise centered at each test frequency and available for all frequencies with 3 dB down bandwidth of greater than octave but less than 2 octave The maximum dB HL is 15 dB below the maximum pure tone level and is calibrated in effective masking Speech Noise The Speech Noise pushbutton selects speech noise This is a white noise filtered to a low and m
102. st Number Correct 4 sInt SISI Test 125 Hz Test Ear Threshold 2 uChar SISI Test 125 Hz Pulse Height 2 uChar SISI Test 125 Hz Number Presented 2 uChar SISI Test 125 Hz Number Correct SISI Test 250 Hz See Pure Tone Test 125 Hz fields See Pure Tone Test 125 Hz fields 362 20 Pure Tone Test See Pure Tone Test 16 kHz 125 Hz fields Pure Tone Test See Pure Tone Test 18 kHz 125 Hz fields See Pure Tone Test 125 Hz fields Pure Tone Test 20 kHz 0 Forehead 1 Mastoid 20 to 120 dB x 2 NR 260 to 540 NT 32768 0x8000 20 to 120 dB x 2 NR 260 to 540 NT 32768 0x8000 0 None _1 White Noise 2 Speech Noise 3 Ext A 4 Ext B x2 _ 20 to 120 dB HL NR 260 to 540 NT 32768 0x8000 ES 5 dB hi 2 dB 20 1 dB _0 to 100 _0 to 100 See SISI Test 125 Hz Fields 1761 0100 Rev B Chapter 6 Remote Options Character Number of Data Type Field Name Field Description Offset Characters 458 10 SISI Test 500 Hz See SISI Test 125 Hz Fields 468 10 SISI Test 750 Hz See SISI Test 125 Hz Fields 478 10 SISI Test 1 kHz See SISI Test 125 Hz Fields 488 10 SISI Test 1 5 kHz See SISI Test 125 Hz Fields 408 10 SISI Test 2 kHz See SISI Test 125 Hz Fields 508 10 SISI Test 3 kHz See SISI Test 125 Hz Fields 518 10 SISI Test 4 kHz See SISI Test 125 Hz Fields 528 10 SISI Test 6 kHz See SISI
103. sting information from the instrument When the LCD is in the lowered position easy access to the rear connector panel is provided The data from the GSI 61 is provided in two formats Instrument Status and Audiogram The following figure shows the Instrument Status screen e Channel 2 Stimulus SISI Stimulus NB Moise Transducer Phone dB Step Transducer Phone Bouting Right Interlock Interrupt The output in dB HL for Channel 1 and Channel 2 b A graphical representation of the VU meters for each channel C d e The tone ON icon which is displayed when the presentation is made The stimulus transducer and routing currently selected for each channel If the Interrupt is on this is also displayed in this area Frequency in Hz selected for Channel 1 or Channel 2 The indicator bar for the subject response displays when the handswitch is depressed When a speech type condition is selected this area 15 blank Timer Scorer General system state including tone presentation format dB step size special tests monitor speaker High Frequency optional Remote optional with data transfer and print optional Error messages status messages Refer to Chapter 7 for a description of the error and status 1761 0100 Rev B 1761 0100 f g Chapter 2 Installation The following figure is a representation of the standard audiogram Standard Audiogram h Frequenc
104. t interruption Speech noise is introduced to both ears Left Right through Channel 2 along with the words 3j Speech noise is introduced at a low level 0 dB HL is suggested and is increased in 5 dB increments with the Channel 2 attenuator for each spoken spondee until the intensity level is 20 dB below the SRT 5 4 Obtain the noise detection threshold NDT 5 Obtain the noise interference level NIL by increasing noise in 2 dB steps Channel 2 until the patient stops repeating the spondees 6 Maintain speech signal intensity Channel 1 at the same level while increasing the intensity of the noise Channel 2 in 5 dB steps to a level 20 dB above NIL Present one word at each increment level 7 Maintain the noise at this level Channel 2 and reduce the intensity of spondees in 5 dB steps Channel 1 to a level 15 dB below SRT Present one word at each decrement 8 Decrease the level of noise in 5 dB steps Channel 2 for each spoken spondee until NIL is reached Continue to decrease noise level and note the level at which the patient begins to again repeat spondees 9 kReestablish a speech threshold 5 as in Step 1 Modified Doerfler Stewart Test This test is performed in one ear using pure tones and white noise as a masker Routing selection for Channel 1 Tone and Channel 2 White Noise should be the same for the ear being tested left or right 1761 0100 Rev B 4 11 Grason Stadler GSI 61 CLI
105. te the possible source of the problem Note Itis extremely important to record these numbers Reset the GSI 61 by turning off the power waiting 30 seconds then turning it on Should Help continue to be displayed contact a service representative and report the specific conditions used Line Voltage Brownout and Interruptions The GSI 61 is designed to protect against abnormal AC power conditions by returning to the power up initialization settings thereby protecting the unit against unwanted conditions at the transducers This will automatically occur when interference is not too severe However under extreme conditions the GSI 61 will enter a lockout mode which will not permit front panel operations This can be rectified by simply powering down for approximately thirty seconds and then restarting operation 5 6 1761 0100 Rev B Chapter 6 Remote Options Description The interface option for the GSI 61 Clinical Audiometer allows electronic transmission of test parameter information from the GSI 61 to a remote external computer the user may also remotely control the operations of the GSI 61 by an external computer The RS 232 option can only be used with those instruments which have the Remote board installed Two communication protocols are available with the GSI 61 One is identical to the protocol used on the GSI 16 Audiometer allowing the GSI 61 to be used in the same environment as that instrument The other interface prot
106. tery Data Record Record Prefix Left Ear Test Data Pure Tone Character Number of Field Name Field Description Offset Characters 19 4 Ch 1 Numeric 200 to 1000 HL Display Data Range 20 0 to 100 0 dB Ch 1 Interrupt os 24 4 Ch 2 Numeric 200 to 1000 Display Data Range 20 0 to 100 0 dB 29 5 Frequency Display 125 20000 Data Range 125 to 20000 Hz in standard audiometric frequencies 34 5 Timer Value Elapsed time in seconds Range 0 to 12000 seconds 39 3 Scorer Correct Number of correct Speech Test Value Zero responses Range 0 to 100 42 3 Scorer Total Value Total number of Speech Test presentations Range 0 to 100 Record Terminator ER LEE Contains all left and right ear test data currently stored in the test data memory This record is not GSI 16 compatible Character Number of Data Type Field Name Field Description Offset Characters ASCII Record Type 6 Pure Tone Test 20 to 120 dB x 2 125 Hz Air NR 260 to 540 Conduction NT 32768 0x8000 Threshold Test Ear Pure Tone Test 20 to 120 dB x 2 125 Hz Air NR 260 to 540 Conduction NT 32768 0x8000 Threshold Masking Ear 1761 0100 Rev B 1761 0100 Chapter 6 Remote Options Character Number of Data Type Field Name Field Description Offset Characters Pure Tone Test 125 Hz Bone Conduction
107. tton Function Ch 1 Spk Ch 1 Insert Ch 2 Phone Ch 2 Bone Ch 2 Spk Ch 2 Insert Ch 1 Left Ch 1 Right Ch Left Right Ch 2 Left Ch 2 Right Ch 2 Left Right Exit to Normal Mode Enter HL Calibration Mode Correct Start Clear Clear Incorrect Stop Turn Oscillator off Turn Oscillator on Status display Audiogram display High Freq Audiogram Display High Freq 8000 20000 Hz Normal Freq 125 12000 Hz Transmit Unit ID 0 1761 0100 Input Record Type 6 Set Test Frequency Record 1761 0100 Rev B Chapter 6 Remote Options Function Function Group Function Sub Code Pushbutton Code Subgroup Function Transmit Unit 0 configuration record Load Default Data Load HL configuration default data Load Self Calibration default data Load all default data Data Transfer Transmit a data output record in the following format Spare format currently defaults to 43 GSI 16 Compatible Short Data Record GSI 61 Short Data Record Test Battery Data Record Enter Diagnostic Exit to Normal Mode Mode Enter Push Button diagnostic Enter Display diagnostic Enter Hardware diagnostic Enter Loopback diagnostic This record is used to set the frequency of the oscillator to the standard audiometric low and high frequencies in the Normal HL Calibration and SISI Calibration modes This record type is invalid in the Push Button diagnostic Display diagnostic and
108. values are from ANSI 3 43 and ISO 7566 No standard reference equivalent threshold level for speech has been established for bone vibrators The reference level used for the calibration of speech is 12 5 dB above the 1000 Hz level or at aforce level of 51 2 dB re 1 N The values in the table are based on 0 dB HL settings 1761 0100 Rev B 1761 0100 Chapter 5 Routine Maintenance Bone Vibrator B71 Calibration Values for Non occluded Test Ear Forehead Placement ANSI 3 43 and ISO 7566 Frequency 250 500 750 1000 1500 2000 3000 4000 6000 8000 Speech Radioear B71 with 79 0 72 0 61 5 51 0 47 5 42 5 42 0 43 5 51 0 50 0 63 5 1 N non occluded ear Tentative Speaker Reference Threshold Levels Re 20 mPa Frequency 125 250 500 750 1000 1500 2000 3000 4000 6000 8000 12000 Speech 45 Azimuth 23 5 12 0 3 0 0 5 0 0 O 235 9 0 8 5 3 0 8 0 11 5 12 5 0 Azimuth 24 0 13 0 660 4 0 4 0 2 5 0 5 4 0 4 5 4 5 13 5 13 5 16 5 Frequency Hz 8000 9000 10000 11200 12500 14000 16000 45 Azimuth 8 0 10 5 11 0 10 0 11 5 16 0 43 5 0 Azimuth 13 5 15 5 15 5 14 0 13 0 18 0 44 5 Notes 1 Forty five degree Azimuth reference threshold values are based on ISO 8253 2 2 Zero degree Azimuth reference threshold values are based on ISO 226 1 Reference Levels for Pure Tones with Sennheiser HDA 200 SPL Values with the Sennheiser HDA 200 Earphones for 0 dB HL Setting Frequency Hz 8K 9K 10K
109. vice department or a local representative Cautions The GSI 61 Clinical Audiometer is designed to be used with a hospital grade outlet Injury to personnel or damage to equipment can result when a three prong or two prong adaptor is connected between the GSI 61 power plug and an AC outlet or extension cord Audiometers which bear the Underwriters Laboratories Inc label should be interconnected with accessories that have the proper electrical compatibility and are listed as meeting the requirements of the UL Medical and Dental Equipment Standard Connection of accessories not meeting these requirements may result in electrical leakage currents in excess of those allowed by the standard and present a potential electrical shock hazard to the person being tested This warning icon found on the back of the LCD panel indicates dangerous voltage within the panel Access to the LCD panel is limited to authorized Grason Stadler service representatives When testing with the High Frequency earphones do not allow the presentation of the signal at the maximum dB HL to exceed 10 minutes The buildup of increased temperature can cause harm to the earphones This caution label refers the user to the accompanying literature and manuals This icon indicates that the GSI 61 is in compliance with Class 1 Type B requirements of IEC 601 1 691 1 The following is the list of status messages which will occur CLASS 1 with operation of the GS
110. we 6 _ Transducer Output These pushbuttons allow easy selection of the transducer for each stimulus Selector available for Channel 1 and Channel 2 transducer selection may be changed at any time Valid Transducer Combinations amet ee Channel 2 Ce ee Routing Output These pushbuttons allow the easy selection of the routing from the stimulus to the Selector output transducer available for Channel 1 and Channel 2 When first powered on the routing for Channel 1 will be right and the routing for Channel 2 is left Left Right mixes the stimuli from both channels to each transducer and drives both the left and right transducers with the combined signal Both the Channel and Channel 2 maximum dB HL limits in mixing are appropriately decreased from the non mixed maximum dB HL limits Left Right Left Right routing is restricted to Phone Phone Speaker Speaker and Insert Insert paired insert option Left Right routing is invalid for bone and the single insert phone Tone Bar Interrupt Each tone bar operates independently to present the selected stimulus for as long as the bar is depressed The channel turns off immediately when the bar is released When ALTernate is selected and the tone bar is released the complete presentation of both channel signals is completed These pushbuttons determine the status of the respective tone bars and operate indep
111. y in Hz selected for Channel 1 or Channel 2 The indicator bar for the subject response displays when the handswitch is pressed The saved dB HL and effective masking level for the intersected frequency and Hearing Level Current output in dB HL for Channel 1 and Channel 2 also the stimulus transducer and routing currently selected for each channel If the Interrupt is on this is also displayed in this area The tone ON icon is displayed when the presentation is made The general system state including signal format dB step size special tests monitor speaker High Frequency optional Remote optional with data transfer and print optional The graphic representation of the audiogram The display is designed so that the patient s right ear audiogram will be on the operator s left portion of the display The left ear is on the right side of the display In the above figure the x axis is labeled Left Ear or Right Ear Frequency Hz and is marked at the octave intervals of 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz and 8 kHz The dashed grid lines are displayed at the one half octave intervals of 750 Hz 1 5 kHz 3 kHz 6 kHz and 12 kHz The axis is Hearing Level in dB HL This ordinate 15 incremented every 10 dB starting at 10 dB and ending at 120 dB When aresult is saved the appropriate audiometric symbol is located on the audiogram No Response symbols are placed on the audiogram at the maximum output limit for the tr

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• https://telegra.ph/Wire-Size-Calculator-From-Voltage-Drop-fcae9099-11-18
• https://telegra.ph/Wire-Size-Calculator-From-Voltage-Drop-ca2f48b5-11-18