ac40 1060 service manual

Clinical Audiometer AC40

Part number 8100837 Rev. 2

Valid from 10/2013

Service Manual

AC40 Service Manual Page 2

Contents

Contents 1

General information 2

Survey of reference and max hearing level Tone Audiometer 3

ANSI Free Field 7

IEC Free Field 7

Survey of reference and max hearing level Speech Audiometer 8

Swedish Speech calibration 10

Norwegian Speech Calibration 11

Equivalent free field 12

General properties for earphones 12

Accessories and Parts 14

Accessories 14

Consumables and Parts 17

Schematics 19

Block Diagram 19

Disassembly 20

Open the Cabinet 20

Remove the PCA Back Board and Side Board 21

Remove the Power Supply 22

Remove the Display 23

Adjusting the knobs after reassembly 24

Calibration Procedure 26

Service, adjustment and repair 26

Phasing of headphones 27

Calibration of test equipment 27

Calibration Mode Entering 27

Checklist for calibration 28

Calibration standard for Audiometer 29

Selecting TDH39 headset 30

Selecting DD45 headset 33

Selecting HDA200 headset 36

Selecting HDA280 headset 39

Selecting EAR3A Insert phone 42

Selecting EAR5A Insert phone 45

Selecting CIR22/CIR33 Insert masking transducer 48

Selecting B71 Bone transducer 51

Calibration procedure Free Field and Custom Max 54

Select Free field setup 55

Custom max. 56

Transducer calibration 57

Update procedure - Firmware 58

Installing MHA (Master Hearing Aid) wave files: 58

AC40 Stand Alone Unit, Print Logo Update 58

Appendix A Update News 1


General information

Interacoustics continuously strives to improve its products and their performance, therefore the specifications can be

subject to change without notice.

The performance and specifications of the instrument can only be guaranteed if it is subject to technical maintenance

at least once a year. This should be done by a workshop authorized by Interacoustics (refer to calibration procedure on

page 26).

Questions about representatives and products may be sent to:

Interacoustics A/S Phone: +45 63713555

Drejervaenget 8 Fax: +45 63713522

DK 5610 Assens e-mail: [email protected]

Denmark http: www.interacoustics.com


Survey of reference and max hearing level Tone Audiometer

ANSI TDH39

Coupler: ANSI S3.7-1995 (NBS-9A) /

IEC 60318-3 1998 (6ccm)

Tone Audiometer

Tone Narrow Band Noise

ANSI S3.6-2010 ANSI S3.6-2010

Frequency RETSPL MaxHL RETSPL MaxHL

125 45.0 90 49.0 75

160 37.5 95 41.5 85

200 31.5 100 35.5 90

250 25.5 110 29.5 95

315 20.0 115 24.0 100

400 15.0 120 19.0 105

500 11.5 120 15.5 110

630 8.5 120 13.5 110

750 8.0 120 13.0 110

800 7.0 120 12.0 110

1000 7.0 120 13.0 110

1250 6.5 120 12.5 110

1500 6.5 120 12.5 110

1600 7.0 120 13.0 110

2000 9.0 120 15.0 110

2500 9.5 120 15.5 110

3000 10.0 120 16.0 110

3150 10.0 120 16.0 110

4000 9.5 120 14.5 110

5000 13.0 120 18.0 110

6000 15.5 120 20.5 110

6300 15.0 120 20.0 110

8000 13.0 110 18.0 100

WhiteNoise 0.0 120

TEN Noise 25.0 110

The RETSPL is copy from ISO389-1 1998

ANSI HDA 280

Coupler ANSI S3.7-1995 (NBS-9A) /

IEC 60318-3 1998 (6ccm)

Tone Audiometer


PTB PTB


125 38.5 105 42.5 75

160 33.5 110 37.5 80

200 29.5 115 33.5 85

250 25.0 120 29.0 90

315 21.0 120 25.0 95

400 17.0 120 21.0 95

500 13.0 120 17.0 100

630 10.5 120 15.5 100

750 9.0 120 14.0 105

800 8.5 120 13.5 105

1000 7.5 120 13.5 105

1250 8.5 120 14.5 105

1500 9.5 120 15.5 105

1600 9.0 120 15.0 105

2000 8.0 120 14.0 105

2500 7.0 120 13.0 105

3000 6.5 120 12.5 105

3150 7.0 120 13.0 105

4000 9.5 120 14.5 105

5000 12.0 120 17.0 105

6000 19.0 115 24.0 95

6300 19.0 115 24.0 95

8000 18.0 105 23.0 90

WhiteNoise 0.0 120

This value is interpolated on Interacoustics

IEC TDH39

Coupler: IEC 60318-3 1998 (6ccm)

Tone Audiometer


ISO 389-1 1998 ISO 389-4 1994


125 45.0 90 49.0 75

160 37.5 95 41.5 85

200 31.5 100 35.5 90

250 25.5 110 29.5 95

315 20.0 115 24.0 100

400 15.0 120 19.0 105

500 11.5 120 15.5 110

630 8.5 120 13.5 110

750 7.5 120 12.5 110

800 7.0 120 12.0 110

1000 7.0 120 13.0 110

1250 6.5 120 12.5 110

1500 6.5 120 12.5 110

1600 7.0 120 13.0 110

2000 9.0 120 15.0 110

2500 9.5 120 15.5 110

3000 10.0 120 16.0 110

3150 10.0 120 16.0 110

4000 9.5 120 14.5 110

5000 13.0 120 18.0 110

6000 15.5 120 20.5 110

6300 15.0 120 20.0 110

8000 13.0 110 18.0 100

WhiteNoise 0.0 120

TEN Noise 25.0 110

IEC HDA 280

Coupler IEC 60318-3 1998 (6ccm)

Tone Audiometer


PTB ISO 389-4 1994


125 38.5 105 42.5 75

160 33.5 110 37.5 80

200 29.5 115 33.5 85

250 25.0 120 29.0 90

315 21.0 120 25.0 95

400 17.0 120 21.0 95

500 13.0 120 17.0 100

630 10.5 120 15.5 100

750 9.0 120 14.0 105

800 8.5 120 13.5 105

1000 7.5 120 13.5 105

1250 8.5 120 14.5 105

1500 9.5 120 15.5 105

1600 9.0 120 15.0 105

2000 8.0 120 14.0 105

2500 7.0 120 13.0 105

3000 6.5 120 12.5 105

3150 7.0 120 13.0 105

4000 9.5 120 14.5 105

5000 12.0 120 17.0 105

6000 19.0 115 24.0 95

6300 19.0 115 24.0 95

8000 18.0 105 23.0 90


WhiteNoise 0.0 120


IEC EAR 3A

Coupler: IEC 60318-5 2006 2ccm

Tone Audiometer


ISO 389-2 1994 ISO 389-4 1994

Frequency RETSPL MaxH

L

RETSPL MaxHL

125 26.0 90 30.0 90

160 22.0 95 26.0 95

200 18.0 100 22.0 100

250 14.0 105 18.0 105

315 12.0 105 16.0 105

400 9.0 110 13.0 105

500 5.5 110 9.5 110

630 4.0 115 9.0 110

750 2.0 115 7.0 110

800 1.5 115 6.5 110

1000 0.0 120 6.0 110

1250 2.0 120 8.0 110

1500 2.0 120 8.0 110

1600 2.0 120 8.0 110

2000 3.0 120 9.0 110

2500 5.0 120 11.0 110

3000 3.5 120 9.5 110

3150 4.0 120 10.0 110

4000 5.5 115 10.5 110

5000 5.0 105 10.0 105

6000 2.0 100 7.0 100

6300 2.0 100 7.0 100

8000 0.0 95 5.0 95

WhiteNoise 0.0 110


ANSI HDA 200

Coupler: IEC60318-2 with type 1 adaptor

Tone Audiometer


ANSI S3.6-2010 ANSI S3.6-2010

Frequency RETSPL MaxHL RETSPL 1/3 MaxHL

125 30.5 100 34.5 75

160 26.0 105 30.0 80

200 22.0 105 26.0 80

250 18.0 110 22.0 85

315 15.5 115 19.5 90

400 13.5 115 17.5 95

500 11.0 115 15.0 95

630 8.0 120 13.0 95

750 6.0 120 11.0 100

800 6.0 120 11.0 100

1000 5.5 120 11.5 100

1250 6.0 110 12.0 95

1500 5.5 115 11.5 100

1600 5.5 115 11.5 100

2000 4.5 115 10.5 100

2500 3.0 115 9.0 100

3000 2.5 115 8.5 100

3150 4.0 115 10.0 100

4000 9.5 115 14.5 100

5000 14.0 105 19.0 95

6000 17.0 105 22.0 90

6300 17.5 105 22.5 90

8000 17.5 105 22.5 90

9000 19.0 100 24.0 85

10000 22.0 100 27.0 85

11200 23.0 95 28.0 80

12500 27.5 90 32.5 75

14000 35.0 80 40.0 70

16000 56.0 60 61.0 50

18000 83.0 30 88.0 20

20000 105.0 15 110.0 0

WhiteNoise 0.0 115

The RETSPL is copy from ISO389-8 2001.

numbers have been established and accepted in the industry

ANSI EAR 3A

Coupler: ANSI S3.7-1995 (HA-2 with 5mm rigid Tube)

Tone Audiometer


ANSI S3.6-2010 ANSI S3.6-2010


125 26.0 90 30.0 90

160 22.0 95 26.0 95

200 18.0 100 22.0 100

250 14.0 105 18.0 105

315 12.0 105 16.0 105

400 9.0 110 13.0 105

500 5.5 110 9.5 110

630 4.0 115 9.0 110

750 2.0 115 7.0 110

800 1.5 115 6.5 110

1000 0.0 120 6.0 110

1250 2.0 120 8.0 110

1500 2.0 120 8.0 110

1600 2.0 120 8.0 110

2000 3.0 120 9.0 110

2500 5.0 120 11.0 110

3000 3.5 120 9.5 110

3150 4.0 120 10.0 110

4000 5.5 115 10.5 110

5000 5.0 105 10.0 105

6000 2.0 100 7.0 100

6300 2.0 100 7.0 100

8000 0.0 95 5.0 95

WhiteNoise 0.0 110

IEC HDA 200


Tone Audiometer


ISO 389-8 2004 ISO 389-4 1994

Frequency RETSPL MaxHL RETSPL 1/3 MaxHL

125 30.5 100 34.5 75

160 26.0 105 30.0 80

200 22.0 105 26.0 80

250 18.0 110 22.0 85

315 15.5 115 19.5 90

400 13.5 115 17.5 95

500 11.0 115 15.0 95

630 8.0 120 13.0 95

750 6.0 120 11.0 100

800 6.0 120 11.0 100

1000 5.5 120 11.5 100

1250 6.0 110 12.0 95

1500 5.5 115 11.5 100

1600 5.5 115 11.5 100

2000 4.5 115 10.5 100

2500 3.0 115 9.0 100

3000 2.5 115 8.5 100

3150 4.0 115 10.0 100

4000 9.5 115 14.5 100

5000 14.0 105 19.0 95

6000 17.0 105 22.0 90

6300 17.5 105 22.5 90

8000 17.5 105 22.5 90

ISO 389-5 2006 ISO 389-5 2006 + 5 dB

8000 17.5 105 22.5 90

9000 19.0 100 24.0 85

10000 22.0 100 27.0 85

11200 23.0 95 28.0 80

12500 27.5 90 32.5 75

14000 35.0 80 40.0 70

16000 56.0 60 61.0 50

18000 83.0 30 88.0 20

20000 105.0 15 110.0 0

WhiteNoise 0.0 115

numbers have been established and accepted in the industry


ANSI Ear 5A

Coupler ANSI S3.7-1995 (HA-2 with 5mm rigid Tube)

Tone Audiometer


ANSI S3.6-2010 ANSI S3.6-2010


125 26.0 95 30.0 85

160 22.0 95 26.0 90

200 18.0 100 22.0 95

250 14.0 100 18.0 100

315 12.0 105 16.0 100

400 9.0 105 13.0 105

500 5.5 110 9.5 110

630 4.0 115 9.0 110

750 2.0 120 7.0 110

800 1.5 120 6.5 110

1000 0.0 120 6.0 110

1250 2.0 120 8.0 110

1500 2.0 120 8.0 110

1600 2.0 120 8.0 110

2000 3.0 120 9.0 110

2500 5.0 120 11.0 110

3000 3.5 120 9.5 110

3150 4.0 120 10.0 110

4000 5.5 120 10.5 110

5000 5.0 110 10.0 110

6000 2.0 105 7.0 105

6300 2.0 105 7.0 105

8000 0.0 100 5.0 100

WhiteNoise 0.0 110

ANSI CIR 22/CIR33

Coupler ANSI S3.7-1995 (HA-2)

Tone Audiometer


ANSI S3.6-2010 ANSI S3.6-2010


125 26.0 90 30.0 90

160 22.0 95 26.0 95

200 18.0 100 22.0 100

250 14.0 105 18.0 105

315 12.0 105 16.0 105

400 9.0 110 13.0 105

500 5.5 110 9.5 110

630 4.0 115 9.0 110

750 2.0 115 7.0 110

800 1.5 115 6.5 110

1000 0.0 120 6.0 110

1250 2.0 120 8.0 110

1500 2.0 120 8.0 110

1600 2.0 120 8.0 110

2000 3.0 120 9.0 110

2500 5.0 120 11.0 110

3000 3.5 120 9.5 110

3150 4.0 120 10.0 110

4000 5.5 115 10.5 105

5000 5.0 105 10.0 95

6000 2.0 100 7.0 95

6300 2.0 100 7.0 95

8000 0.0 90 5.0 90

WhiteNoise 0.0 110

IEC Ear 5A

Coupler IEC 60318-5 2006 2ccm

Tone Audiometer


ISO 389-2 1994 ISO 389-4 1994


125 26.0 95 30.0 85

160 22.0 95 26.0 90

200 18.0 100 22.0 95

250 14.0 100 18.0 100

315 12.0 105 16.0 100

400 9.0 105 13.0 105

500 5.5 110 9.5 110

630 4.0 115 9.0 110

750 2.0 120 7.0 110

800 1.5 120 6.5 110

1000 0.0 120 6.0 110

1250 2.0 120 8.0 110

1500 2.0 120 8.0 110

1600 2.0 120 8.0 110

2000 3.0 120 9.0 110

2500 5.0 120 11.0 110

3000 3.5 120 9.5 110

3150 4.0 120 10.0 110

4000 5.5 120 10.5 110

5000 5.0 110 10.0 110

6000 2.0 105 7.0 105

6300 2.0 105 7.0 105

8000 0.0 100 5.0 100

WhiteNoise 0.0 110

IEC CIR 22/CIR33

Coupler IEC 60318-5 2006 2ccm

Tone Audiometer


ISO 389-2 1994 ISO 389-4 1994


125 26.0 90 30.0 90

160 22.0 95 26.0 95

200 18.0 100 22.0 100

250 14.0 105 18.0 105

315 12.0 105 16.0 105

400 9.0 110 13.0 105

500 5.5 110 9.5 110

630 4.0 115 9.0 110

750 2.0 115 7.0 110

800 1.5 115 6.5 110

1000 0.0 120 6.0 110

1250 2.0 120 8.0 110

1500 2.0 120 8.0 110

1600 2.0 120 8.0 110

2000 3.0 120 9.0 110

2500 5.0 120 11.0 110

3000 3.5 120 9.5 110

3150 4.0 120 10.0 110

4000 5.5 115 10.5 105

5000 5.0 105 10.0 95

6000 2.0 100 7.0 95

6300 2.0 100 7.0 95

8000 0.0 90 5.0 90

WhiteNoise 0.0 110


ANSI B71

Coupler ANSI S3.13

Tone Audiometer


ANSI S3.6 -2010 ANSI S3.6 - 2010


125 - - - -

160 - - - -

200 - - - -

250 67.0 45 71.0 35

315 64.0 50 68.0 40

400 61.0 65 65.0 55

500 58.0 65 62.0 55

630 52.5 70 57.5 60

750 48.5 70 53.5 60

800 47.0 70 52.0 60

1000 42.5 70 48.5 60

1250 39.0 70 45.0 60

1500 36.5 70 42.5 60

1600 35.5 70 41.5 60

2000 31.0 75 37.0 65

2500 29.5 80 35.5 65

3000 30.0 80 36.0 65

3150 31.0 80 37.0 65

4000 35.5 80 40.5 65

5000 40.0 60 45.0 50

6000 40.0 50 45.0 45

6300 40.0 50 45.0 40

8000 40.0 50 45.0 40

WhiteNoise 42.5 70

ANSI DD45


Tone Audiometer


PTB DTU 2010 ISO 389-4 1994


125 47.5 90 51.5 75

160 40.5 95 44.5 80

200 33.5 100 37.5 90

250 27.0 110 31.0 95

315 22.5 115 26.5 100

400 17.5 120 21.5 105

500 13.0 120 17.0 110

630 9.0 120 14.0 110

750 6.5 120 11.5 110

800 6.5 120 11.5 110

1000 6.0 120 12.0 110

1250 7.0 120 13.0 110

1500 8.0 120 14.0 110

1600 8.0 120 14.0 110

2000 8.0 120 14.0 110

2500 8.0 120 14.0 110

3000 8.0 120 14.0 110

3150 8.0 120 14.0 110

4000 9.0 120 14.0 110

5000 13.0 120 18.0 110

6000 20.5 115 25.5 105

6300 19.0 115 24.0 105

8000 12.0 110 17.0 100

WhiteNoise 0 120

TEN Noise 25.0 110


IEC B71

Coupler 60318-6 2007

Tone Audiometer


ISO 389-3 1994 ISO 389-4 1994


125 - - - -

160 - - - -

200 - - - -

250 67.0 45 71.0 35

315 64.0 50 68.0 40

400 61.0 65 65.0 55

500 58.0 65 62.0 55

630 52.5 70 57.5 60

750 48.5 70 53.5 60

800 47.0 70 52.0 60

1000 42.5 70 48.5 60

1250 39.0 70 45.0 60

1500 36.5 70 42.5 60

1600 35.5 70 41.5 60

2000 31.0 75 37.0 65

2500 29.5 80 35.5 65

3000 30.0 80 36.0 65

3150 31.0 80 37.0 65

4000 35.5 80 40.5 65

5000 40.0 60 45.0 50

6000 40.0 50 45.0 45

6300 40.0 50 45.0 40

8000 40.0 50 45.0 40

WhiteNoise 42.5 70

IEC DD45


Tone Audiometer


PTB DTU 2010 ISO 389-4 1994


125 47.5 90 51.5 75

160 40.5 95 44.5 80

200 33.5 100 37.5 90

250 27.0 110 31.0 95

315 22.5 115 26.5 100

400 17.5 120 21.5 105

500 13.0 120 17.0 110

630 9.0 120 14.0 110

750 6.5 120 11.5 110

800 6.5 120 11.5 110

1000 6.0 120 12.0 110

1250 7.0 120 13.0 110

1500 8.0 120 14.0 110

1600 8.0 120 14.0 110

2000 8.0 120 14.0 110

2500 8.0 120 14.0 110

3000 8.0 120 14.0 110

3150 8.0 120 14.0 110

4000 9.0 120 14.0 110

5000 13.0 120 18.0 110

6000 20.5 115 25.5 105

6300 19.0 115 24.0 105

8000 12.0 110 17.0 100

WhiteNoise 0 120

TEN Noise 25.0 110



ANSI Free Field

ANSI Free Field

ANSI S3.6-2010 Free Field max SPL

Free Field max HL is found by subtracting the selected RETSPL value

Binaural Monaural Free Field Power Free Field Line

0 45 90 0 45 90 Tone NB Tone NB

Frequency RETSPL RETSPL RETSPL RETSPL RETSPL RETSPL Max SPL Max SPL Max SPL Max SPL

125 22.0 21.5 21.0 24.0 23.5 23.0 97 82 102 97

160 18.0 17.0 16.5 20.0 19.0 18.5 93 83 98 93

200 14.5 13.5 13.0 16.5 15.5 15.0 94.5 84.5 104.5 99.5

250 11.5 10.5 9.5 13.5 12.5 11.5 96.5 86.5 106.5 101.5

315 8.5 7.0 6.0 10.5 9.0 8.0 93.5 83.5 103.5 98.5

400 6.0 3.5 2.5 8.0 5.5 4.5 96 86 106 101

500 4.5 1.5 0.0 6.5 3.5 2.0 94.5 84.5 104.5 99.5

630 3.0 -0.5 -2.0 5.0 1.5 0.0 93 83 103 98

750 2.5 -1.0 -2.5 4.5 1.0 -0.5 92.5 82.5 102.5 97.5

800 2.0 -1.5 -3.0 4.0 0.5 -1.0 92 87 107 102

1000 2.5 -1.5 -3.0 4.5 0.5 -1.0 92.5 82.5 102.5 97.5

1250 3.5 -0.5 -2.5 5.5 1.5 -0.5 93.5 83.5 103.5 98.5

1500 2.5 -1.0 -2.5 4.5 1.0 -0.5 92.5 82.5 102.5 97.5

1600 1.5 -2.0 -3.0 3.5 0.0 -1.0 96.5 86.5 106.5 101.5

2000 -1.5 -4.5 -3.5 0.5 -2.5 -1.5 93.5 83.5 103.5 98.5

2500 -4.0 -7.5 -6.0 -2.0 -5.5 -4.0 91 81 101 96

3000 -6.0 -11.0 -8.5 -4.0 -9.0 -6.5 94 84 104 94

3150 -6.0 -11.0 -8.0 -4.0 -9.0 -6.0 94 84 104 94

4000 -5.5 -9.5 -5.0 -3.5 -7.5 -3.0 94.5 84.5 104.5 99.5

5000 -1.5 -7.5 -5.5 0.5 -5.5 -3.5 93.5 83.5 108.5 98.5

6000 4.5 -3.0 -5.0 6.5 -1.0 -3.0 94.5 84.5 104.5 99.5

6300 6.0 -1.5 -4.0 8.0 0.5 -2.0 96 86 106 96

8000 12.5 7.0 4.0 14.5 9.0 6.0 87.5 72.5 92.5 87.5

WhiteNoise 0.0 0.0 0.0 0.0 0.0 0.0 90 100

IEC Free Field

IEC Free Field

ISO 389-7 2005 Free Field max SPL

Free Field max HL is found by subtracting the selected RETSPL value


0 45 90 0 45 90 Tone NB Tone NB

Frequency RETSPL RETSPL RETSPL RETSPL RETSPL RETSPL Max SPL Max SPL Max SPL Max SPL

125 22.0 21.5 21.0 24.0 23.5 23.0 97 82 102 97

160 18.0 17.0 16.5 20.0 19.0 18.5 93 83 98 93

200 14.5 13.5 13.0 16.5 15.5 15.0 94.5 84.5 104.5 99.5

250 11.5 10.5 9.5 13.5 12.5 11.5 96.5 86.5 106.5 101.5

315 8.5 7.0 6.0 10.5 9.0 8.0 93.5 83.5 103.5 98.5

400 6.0 3.5 2.5 8.0 5.5 4.5 96 86 106 101

500 4.5 1.5 0.0 6.5 3.5 2.0 94.5 84.5 104.5 99.5

630 3.0 -0.5 -2.0 5.0 1.5 0.0 93 83 103 98

750 2.5 -1.0 -2.5 4.5 1.0 -0.5 92.5 82.5 102.5 97.5

800 2.0 -1.5 -3.0 4.0 0.5 -1.0 92 87 107 102

1000 2.5 -1.5 -3.0 4.5 0.5 -1.0 92.5 82.5 102.5 97.5

1250 3.5 -0.5 -2.5 5.5 1.5 -0.5 93.5 83.5 103.5 98.5

1500 2.5 -1.0 -2.5 4.5 1.0 -0.5 92.5 82.5 102.5 97.5

1600 1.5 -2.0 -3.0 3.5 0.0 -1.0 96.5 86.5 106.5 101.5

2000 -1.5 -4.5 -3.5 0.5 -2.5 -1.5 93.5 83.5 103.5 98.5

2500 -4.0 -7.5 -6.0 -2.0 -5.5 -4.0 91 81 101 96

3000 -6.0 -11.0 -8.5 -4.0 -9.0 -6.5 94 84 104 94

3150 -6.0 -11.0 -8.0 -4.0 -9.0 -6.0 94 84 104 94

4000 -5.5 -9.5 -5.0 -3.5 -7.5 -3.0 94.5 84.5 104.5 99.5

5000 -1.5 -7.5 -5.5 0.5 -5.5 -3.5 93.5 83.5 108.5 98.5

6000 4.5 -3.0 -5.0 6.5 -1.0 -3.0 94.5 84.5 104.5 99.5

6300 6.0 -1.5 -4.0 8.0 0.5 -2.0 96 86 106 96

8000 12.5 7.0 4.0 14.5 9.0 6.0 87.5 72.5 92.5 87.5

WhiteNoise 0.0 0.0 0.0 0.0 0.0 0.0 90 100

The Binaural to Monaural correction on +2dB come from ANSI S3.6 -2004

The difference between 0 - 45 - 90 come from ISO 8253-2 1998.

The maximum free field levels depend on the amplifier, speaker and the acoustic conditions of the room. The actual maximum levels are found

using the Custom Max function in the calibration software.


Survey of reference and max hearing level Speech Audiometer

ANSI Speech

ANSI TDH39

Coupler: ANSI S3.7-1995 (NBS-9A) / IEC 60318-3 1998 (6ccm)

Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010

RETSPL MaxHL RETSPL MaxHL

Linear Type A 19.5 110 19.5 100

Equ. FF Type A-E 15.5 105 15.5 100

Not Linear 7.0 120 7.0 115

Speech WN 22.0 95

ANSI HDA 280


Speech Audiometer

Speech Speech Noise


Linear Type A 20.0 100 20.0 95

Equ. FF Type A-E 21.5 95 21.5 90

Not Linear 7.5 120 7.5 120

Speech WN 22.5 95

ANSI HDA 200


Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010


Linear Type A 19.0 90 19.0 85

Equ. FF Type A-E 18.5 85 18.5 80

Not Linear 5.5 110 5.5 105

Speech WN 21.5 90

ANSI DD45


Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010


Linear Type A 18.5 110 18.5 100

Equ. FF Type A-E 18.5 100 18.5 100

Not Linear 6.0 120 6.0 115

Speech WN 21.0 95

This value come from pure tone 1kHz RETSPL value. (Not linear describe

there is no equalizing of the signal flat electrical response)

ANSI Ear 3A

Coupler: ANSI S3.7-1995 (HA-2 with 5mm rigid Tube)

Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010


Speech 12.5 110 12.5 100

Speech WN 15.0 95

ANSI Ear 5A

Coupler: IEC 60318-5 2006

Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010


Speech 12.5 110 12.5 100

Speech WN 15.0 95

ANSI CIR 22/CIR33

Coupler: ANSI S3.7-1995 (HA-2)

Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010


Speech 12.5 100 12.5 100

Speech WN 15.0 95

ANSI B71

Coupler: ANSI S3.13-1987 (R2002)

Speech Audiometer

Speech Speech Noise

ANSI S3.6-2010 ANSI S3.6-2010


Speech 55.0 60 55.0 50

Speech WN 57.5 55

ANSI Free Field

ANSI S3.6-2010 Free Field max SPL

Free Field max HL is found by subtracting the

selected RETSPL value


0 45 90 0 45 90 0 - 45 - 90 0 - 45 - 90

RETSPL RETSPL RETSPL RETSPL RETSPL RETSPL Max SPL Max SPL

Speech 15.0 11.0 9.5 17.0 13.0 11.5 90 100

Speech Noise 15.0 11.0 9.5 17.0 13.0 11.5 85 100

Speech WN 17.5 13.5 12.0 19.5 15.5 14.0 87.5 97.5


IEC Speech Calibration

IEC TDH39


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Linear Type A 20.0 110 20.0 100

Equ. FF Type A-E 0.5 120 0.5 115

Not Linear 7.0 120 7.0 115

Speech WN 22.5 95

IEC HDA 280


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Linear Type A 20.0 100 20.0 95

Equ. FF Type A-E 6.5 110 6.5 105

Not Linear 7.5 120 7.5 120

Speech WN 22.5 95

IEC HDA 200

Coupler IEC60318-1 with type 1 adaptor

Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Linear Type A 20.0 90 20.0 85

Equ. FF Type A-E 3.5 100 3.5 95

Not Linear 5.5 110 5.5 105

Speech WN 22.5 90

IEC DD45


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Linear Type A 20.0 110 20.0 100

Equ. FF Type A-E 3.5 115 3.5 115

Not Linear 6.0 120 6.0 115

Speech WN 22.5 95

This value come from pure tone 1kHz RETSPL value. (Not linear describe

there is no equalizing of the signal flat electrical response)

IEC Ear 3A

Coupler IEC 60318-5 2006

Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Speech 20.0 100 20.0 90

Speech WN 22.5 85

IEC Ear 5A


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Speech 20.0 100 20.0 90

Speech WN 22.5 85

IEC CIR 22/CIR33


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Speech 20.0 90 20.0 90

Speech WN 22.5 85

IEC B71

Coupler 60318-6 2007

Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Speech 55.0 60 55.0 50

Speech WN 57.5 55

IEC Free Field





0 45 90 0 45 90 0 - 45 - 90 0 - 45 - 90


Speech 0.0 -4.0 -5.5 2.0 -2.0 -3.5 90 100

Speech Noise 0.0 -4.0 -5.5 2.0 -2.0 -3.5 85 100

Speech WN 2.5 -1.5 -3.0 4.5 0.5 -0.5 87.5 97.5


Swedish Speech calibration

SWEDEN TDH39


Speech Audiometer

Speech Speech Noise

STAF 1996 STAF 1996


Linear Type A 22.0 108 27.0 93

Equ. FF Type A-E 0.5 120 0.5 115

Not Linear 22.0 105 27.0 95

Speech WN 22.5 95

SWEDEN HDA 280


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Linear Type A 20.0 100 20.0 95

Equ. FF Type A-E 6.5 110 6.5 105

Not Linear 7.5 120 7.5 120

Speech WN 22.5 95

SWEDEN HDA 200


Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Linear Type A 20.0 90 20.0 85

Equ. FF Type A-E 3.5 100 3.5 95

Not Linear 5.5 110 5.5 105

Speech WN 22.5 90

SWEDEN DD45


Speech Audiometer

Speech Speech Noise

STAF 1996 STAF 1996


Linear Type A 22.0 108 27.0 93

Equ. FF Type A-E 3.5 115 3.5 115

Not Linear 22.0 104 27.0 94

Speech WN 22.5 95

SWEDEN EAR 3A


Speech Audiometer

Speech Speech Noise

STAF 1996 STAF 1996


Speech 21.0 99 26.0 84

Speech WN 22.5 85

SWEDEN EAR 5A


Speech Audiometer

Speech Speech Noise

STAF 1996 STAF 1996


Speech 21.0 99 26.0 84

Speech WN 22.5 85

SWEDEN CIR 22/CIR33


Speech Audiometer

Speech Speech Noise

STAF 1996 STAF 1996


Speech 21.0 89 26.0 84

Speech WN 22.5 85

SWEDEN B71

Coupler 60318-6 2007

Speech Audiometer

Speech Speech Noise

IEC60645-2 1997 IEC60645-2 1997


Speech 55.0 60 55.0 50

Speech WN 57.5 55

Sweden Free Field





0 45 90 0 45 90 0 - 45 - 90 0 - 45 - 90


Speech 0.0 -4.0 -5.5 2.0 -2.0 -3.5 90 100

Speech Noise 0.0 -4.0 -5.5 2.0 -2.0 -3.5 85 100

Speech WN 2.5 -1.5 -3.0 4.5 0.5 -0.5 87.5 97.5


Norwegian Speech Calibration

Norway TDH39


Speech Audiometer

Speech Speech Noise

Norway Norway


Linear Type A 40.0 90 40.0 80

Equ. FF Type A-E 0.5 120 0.5 115

Not Linear 7.0 120 7.0 115

Speech WN 22.5 95

Norway HDA 280


Speech Audiometer

Speech Speech Noise

Norway Norway


Linear Type A 40.0 80 40.0 75

Equ. FF Type A-E 6.5 110 6.5 105

Not Linear 7.5 120 7.5 120

Speech WN 22.5 95

Norway HDA 200


Speech Audiometer

Speech Speech Noise

Norway Norway


Linear Type A 40.0 70 40.0 65

Equ. FF Type A-E 3.5 100 3.5 95

Not Linear 5.5 110 5.5 105

Speech WN 22.5 90

Norway DD45


Speech Audiometer

Speech Speech Noise

Norway Norway


Linear Type A 40.0 90 40.0 80

Equ. FF Type A-E 3.5 115 3.5 115

Not Linear 6.0 120 6.0 115

Speech WN 22.5 95

Norway EAR 3A


Speech Audiometer

Speech Speech Noise

Norway Norway


Speech 40.0 80 40.0 70

Speech WN 22.5 85

Norway EAR 5A


Speech Audiometer

Speech Speech Noise

Norway Norway


Speech 40.0 80 40.0 70

Speech WN 22.5 85

Norway CIR 22/CIR33


Speech Audiometer

Speech Speech Noise

Norway Norway


Speech 40.0 70 40.0 70

Speech WN 22.5 85

Norway B71

Coupler 60318-6 2007

Speech Audiometer

Speech Speech Noise

Norway Norway


Speech 75.0 40 75.0 30

Speech WN 57.5 55

Norway Free Field





0 45 90 0 45 90 0 - 45 - 90 0 - 45 - 90


Speech 0.0 -4.0 -5.5 2.0 -2.0 -3.5 90 100

Speech Noise 0.0 -4.0 -5.5 2.0 -2.0 -3.5 85 100

Speech WN 2.5 -1.5 -3.0 4.5 0.5 -0.5 87.5 97.5


Equivalent free field

Equivalent Free Field

Speech Audiometer

TDH39 HDA200 HDA280 DD45

IEC60645-2 1997

ANSI S3.6-2010

ISO389-8 2004 PTB

PTB DTU

IEC60318-3 1998 IEC60318-1 IEC60318-3 1998 2010

Frequency GF-GC GF-GC GF-GC GF-GC

125 -17,5 -5,0 -15,0 -21.5

160 -14,5 -4,5 -14,0 -17.5

200 -12,0 -4,5 -12,5 -14.5

250 -9,5 -4,5 -11,5 -12.0

315 -6,5 -5,0 -10,0 -9.5

400 -3,5 -5,5 -9,0 -7.0

500 -5,0 -2,5 -8,0 -7.0

630 0,0 -2,5 -8,5 -6.5

750 -5,0

800 -0,5 -3,0 -4,5 -4.0

1000 -0,5 -3,5 -6,5 -3.5

1250 -1,0 -2,0 -11,5 -3.5

1500 -12,5

1600 -4,0 -5,5 -12,5 -7.0

2000 -6,0 -5,0 -9,5 -7.0

2500 -7,0 -6,0 -7 -9.5

3000 -10,5

3150 -10,5 -7,0 -10,0 -12.0

4000 -10,5 -13,0 -14,5 -8.0

5000 -11,0 -14,5 -12,5 -8.5

6000 -14,5

6300 -10,5 -11,0 -15,5 -9.0

8000 +1,5 -8,5 -9,0 -1.5

General properties for earphones

Sound attenuation values for earphones

Frequenc

y

Attenuation

TDH39/DD45 with MX41/

AR or PN 51 cushion

EAR-Tone 3A

EAR-Tone 5A

HDA200

[Hz] [dB] [dB] [dB]

125 3 33,5 14,5

160 4

200 5

250 5 34,5 16

315 5

400 6

500 7 34,5 22,5

630 9

750 -

800 11

1000 15 35,0 28,5

1250 18

1500 -

1600 21

2000 26 33,0 32

2500 28

3000 -

3150 31

4000 32 39,5 45,5

5000 29

6000 -

6300 26

8000 24 43,5 44


Calibration properties

Calibrated Transducers: Earphones: Telephonics TDH39 with a static force of 4.5N 0.5N

Interacoustics DD45 with a static force of 4.5N 0.5N

Sennheiser HDA200 with a static force of 10N1.0N

Sennheiser HDA280 with a static force of 4.5N 0.5N

Bone conductor: Radioear B71 with a static force of 5.4N 0.5N

Insert phones: EAR Tone 3A (Option)

EAR Tone 5A (Option)

Accuracies: Generally the instrument is made and calibrated to be within and better than the tolerances required

in the specified audiometer standards:

Frequency: 0.1%

Pure tone levels: 3 dB for 125 4000Hz

5 dB for 6000 8000Hz

Speech frequency response : -0/-10 dB at 125 249 Hz

3 dB at 250 4000 Hz

5 dB at 4001 6300 Hz

Tone calibration standards and spectral properties:

Earphones Pure tone: Mean value of PTB report 1.61-4039503/09 and DTU report 27

October 2009 for DD45

ISO 389-1 1998 / ANSI S3.6-2010 for TDH39.

Narrow band noise: Pure Tone + ISO 389-4 1994 values / ANSI S3.6-2010

Spectral properties: IEC 60645-1 2012/ / ANSI S3.6-2010, Narrow band noise

White noise: SPL

Spectral properties: IEC 60645-1 2012, White noise

Bone conductor Pure tone: ISO 389-3 1994 / ANSI S3.6.- 2010 Valid for placement on the human

mastoid

Insert phones Pure tone: ISO 389-2 1994/ ANSI S3.6-2010

Narrow band noise: ISO 389-2 1994 + ISO 389-4 1994 values / ANSI S3.6-2010

Spectral properties: IEC 60645-1 2012, ANSI S3.6-2010 Narrow band noise, electrically

measured.

White noise: SPL

Spectral properties: IEC 60645-1 2012, White noise, electrically measured.

Free field output (calibrated

on location)

Pure tone: ISO 389-7 2005 + ISO8253-2 1992/ ANSI S3.6-2010 Free field

Narrow Band noise: ISO 389-7 2005 + ISO8253-2 1992/ ANSI S3.6-2010

Spectral properties: IEC 60645-1 2012 / ANSI S3.6-2010, Narrow band noise

White noise: SPL

Spectral properties: IEC 60645-1 2012, White noise 80-20000Hz measured with constant

bandwidth

80-20000Hz measured with 1/3 octave filtering


Accessories and Parts

Accessories

Item # IA Item Number Description

8010879

8010819

DD45 Audiometric headset/

TDH 39 Audiometric headset (Optional)

8010876 DD45 telephone 10 ohm

8010625 TDH39P 10 Ohm Earphone Telephonics

8010817 HBA Audiometric head band

For DD45/TDH39 headsets

8010894 DD51 cushion


8010822 Earphone cable IEC-M21 symmetric mono


8010815Eartone 3A 10 Ohm Insert Earphones

8000713Replacement cable

Earphone 3A 10ohm


8010797 EARtone 5A Insert Earphones including

4 large 3C, 10 small 3B and 50 medium 3A Ear

tips

8010893 HDA200 Headset 30 plugs

8010796

8010901

TDH39AA Audiometric Headset with

Amplivox Audiocups

DD45AA Audiometric Headset with

Amplivox Audiocups

8010794

8010953

TDH39 Audiometric Headset

DD45 Audiometric headset

8010872 Headset HDA280 complete

8010870 Monitor Headset with boom PC-131 stereo

headset

8010800 B71 Bone Conductor

30 plug

8011094 IEC-B11 Conductor cable

8011096 B71 Bone Conductor

8011098 P3333 Headband for B71

8001705 Accessory box

For B71 Bone conductor


8010937 CIR33 Insert earphone kit

8011091 APS3 Patient response switch

8013227 Optical USB 1.1 isolation MED

8006480 Gooseneck 1059

8011241 Cable USB 2m

8011273 Cable TCC connection

Minijack to minijack for external CD player

8011237 Mainscable E/F

8011391

up to8011397

8011402

8011406

Mains cables Country specific

Mains cable Brazil

Mains cable Japan

8012959 Cleaning cloth


Consumables and Parts

Consumables


8011371 Pen set and AF12 audiogram chart kit

Parts


PCA Main board 1060

For exchange contact Interacoustics

PCA Key board 1060


8006375 PCA Back Board 1060

8006376 PCA Side Board 1060

8006284 PCA Encoder PCB 1058/1059/...

8009262 Connection PCB 2062

8100308 Micro Secure Digital Card

4GB microSD MLC

8010604 Display LCD 170.4x127.8 color TFY-LCD

8001604 Glass cover display 1060

Display cable


8004158 Ribbon cable 380mm 40pins pitch 0.5mm FFC


8006060 Power Supply 200W order with cable below

8004427 Cable power supply 2062/1060

8003518 Cable tie 92x2.4mm black

For power cable

8010686 Speaker 4ohm with wire and plug


8002686 Cover Display 1060

8002608 Cover Front 1060

8002521 Button rotary 1059

8102492 Cover upper 1059/1060

8001567 Impeller rotary button 1059

8003677 Bearing 17x30x2


Schematics

Block Diagram

TDM

codec

Output Att .

+20-100 dB

Fix Att.

0-25 dB

Ext .

Ranges

+20 dBTDH39

TDH 50

DD 45Input

switch

Ch1

Input Att .

+30-100 dB

Input Att .

+30-100 dB

Talk Forward

Mic 1 Int

Mic 2

CD 1

CD 2

EAR 3A

EAR 5A

Bone

1

Stereo

Monitor

Headset

Output DAC Ch 1 Fix Att. Ch1

Output Sw Ch 1

Output Sw Ch 2

Output Sw Ch 3

Input DAC Ch 2

Input DAC Ch 1

Input Sw Ch 1

Input Sw Ch 2

Output

switch

Ch1

Output

switch

Ch2

Output

switch

Ch3

Output

switch

Ch4

Input

switch

Ch2

2*Mono

2*Mono

Phone

Insert

TDM Serial

SD

card

Socket

SPI

Flash

Reset

DSP

FlashDDR

Ram

USB Device

Pat. R.

2

USB Host

SP

I

IRQ

CP

U

IRQ

DS

P

Pat . R.

1

B71

Author

Current revision

File Location

AC40 BlockDiagram

AC40 block diagram

Document Name

Project Name

Revision date

Ib Pedersen

2.0

08-06-2012

D-0100718

Input Ch 1-2

select

Fix Att. Ch1-2

code

Output Ch 1-2

code

Input Ch 3-4

Select

Mute Ch 1-2

FF1-2 Line

Fix Att Ch3-4

Code

Output Ch 3-4

Code

Mute Ch 3-4

FF3-4 Line

SPI DAC 1

DSP

SPI

CS

FLag 20FLag 21

FLag 22

SPI Row 1

SPI Row 0

SPI Row 2

SPI Codec

Stereo

Assistent

Headset

Phone - HF

HDA200

2*Mono

+20dB Ch 1

Output Sw Ch 4

8

channel

DAC

Att. Ch1 Output DAC

Att. Ch2 Output DAC

Att. Ch4 Output DAC

Att. Ch3 Output DAC

Att. Ch1 Intput DAC

Att . Ch2 Intput DAC


SPI Keyboard

matrix /

encoders

Display

600*800

SPI

Key Led ctrl

Keyboard

Ext. Keyboard

Ext . Mouse

Laptop -PC

HUB

USB Host 1

USB Host 4

CPU

SPI

CS

SD

RAMFLag 20

FLag 21

FLag 22

Real

time

clock

Input

110-240V

Power supply

Talk Forward

Mic 1 Ext

FF 1

Power

HDMI


CD

Monitor

LSP 1

Left

Right

Phone 2 L

Phone HF R

Phone 1 R

Phone - HF L

Insert L

Insert R

Insert / HF

Phone 1/2

Insert / HF

FF1

20W

FF1

LineFF1 Line

FF 2

Power

FF2

20W

FF2

Line

FF2 Line

FF2 P

FF1-2 FF1 P

Talk Back Mic

Monitor Ch1

Monitor Ch2

Output Ch 1

Output Ch 2

Output Ch 3

Output Ch 4

Input Ch 1

Input Ch 2

Input Ch 3

Input Ch 4

Output Ch 5

Output Ch 6

Input

switch

Ch3

Input Att .

+30-100 dB

Input DAC Ch 3

Input Sw Ch 3

Input

switch

Ch4

Input Att .

+30-100 dB

Input DAC Ch 4

Input Sw Ch 4

Mute

Mute Ch 1

Output Att .

+20-100 dB

Fix Att.

0-25 dB

Ext .

Ranges

+20 dB

Output DAC Ch 2 Fix Att. Ch2 +20dB Ch 2

Mute

Mute Ch 2

Output Att .

+20-100 dB

Fix Att.

0-25 dB

Ext .

Ranges

+20 dB


Mute

Mute Ch 3

Output Att .

+20-100 dB

Fix Att.

0-25 dB

Ext .

Ranges

+20 dB


Mute

Mute Ch 4

FF 3

Power

FF3

20W

FF3

Line

FF3 Line

FF 4

Power

FF4

20W

FF4

Line

FF4 Line

FF4 P

FF3-4 FF3 P

Bone

2B71

Bone

1

Bone

2

Insert

Masking

Ins

M

Phone 1 L

Phone 2 R

Phone 1/2

+

+

Master

Volume

Master

VolumeInput Ch 4

Input Ch 4

Input Ch 3Input Ch 2

Input Ch 1

Input Ch 4

Input Ch 4Input Ch 4

+

+

Monitor

LSP 2

Reset

Mon Input FF3-4 PwrMon Ass

Ch1/Ch2

SPI Codec

Option

off

LAN

Unik

ID

HDMI

CPU

CPU SPI in

LVDS

Ext. Power

FF. Control

Ext. FF0.5A

Ext . FF Ctrl

5V


Disassembly

Open the Cabinet

All screws used are Torx

To open the cabinet remove - in total 20 pcs. of 3x8mm screws and 2 pcs. of 3x16mm screws

After removing the screws the top and bottom part can be divided

4

pcs

4

pcs

4

pcs

6

pcs

2

pcs

2

pcs


Remove the PCA Back Board and Side Board

Remove boards be mean of M3x5mm screws. Notice not to unscrew the spacer nuts.

Disconnect the connection cables when assembling be aware to lock the cables. Disconnect the USB cables from

the Side Board

5

pcs.

4 pcs

Cable lock


Remove the Power Supply

Remove 4x M3x5 screws from the cabinet bottom

Remove the cable tiess and disconnect the connection cable

Disconnect power and ground cable

37


Remove the Display

Remove the display cover by means of 6 pcs. 2.5x8mm screws on the rear side. The display cover can be romoved

Remove the display glass and the display gasket

Remove 4xM3x5mm screws disconnect the display cable

For change of the display cable contact Interacoustics

38


Adjusting the knobs after reassembly

Before the covers are mounted check the functionality of the knobs

Turn the knob both clockwise and anti-clockwise.

While turning the knob, notice the little square on the screen (see detail picture). The square should ONLY move

after each full click/when it feels like the knob clicks.

Continue with this test, if the square moves before the knob completes one full click.

Hold on to the knob and loosen the nut a little bit. Hold on to the knob and carefully tighten the

encoder, as shown. Tighten clockwise


Hold on to the knob and fasten the nut.

Check if the other knob has to be adjusted

Press the Mask on/off button, to activate it. Turn knob clockwise and anti-clockwise.

If the knob has to be adjusted, use same procedure as described.

Turn the knob clockwise and anti-clockwise, to see if the knob is correctly adjusted. If not, adjust it again!

Remember! The square should ONLY move after each full click/when it feels like the knob clicks .

Continue with this test, if the square moves before the knob completes one full click.


Calibration Procedure

Service, adjustment and repair

Annual calibration (ANSI/ASA S3.6)

The calibration procedure will validate all relevant performance requirements given in ANSI/ASA S3.6. After the

audiometric equipment has been submitted for calibration, a calibration certificate showing the values recorded

must be filled out, signed and dated by the technician, demonstrating that the instrument conforms to all relevant

requirements given in this standard.

NOTE It is considered good practice to perform annual checks of the audiometric test rooms noise level as part of annual

calibration using the applicable table per ANSI/ASA S3.1 American National Standard Maximum Permissible Ambient Noise

Levels for Audiometric Test Rooms to ensure that audiometer performance will not be affected by any changes in the

audiometric test rooms noise levels.

Annual calibration (IEC 60645-1)

A basic calibration shall be performed by a competent laboratory. The procedure shall be such that, after the

audiometric equipment has been submitted for a basic calibration, it shall meet the relevant requirements given in

IEC 60645-1.

When the instrument is returned after basic calibration, it should be checked in accordance with procedures

outlined in 12.3 or 12.4 before being put back into service.

It is recommended that a calibration check label be attached to the equipment, giving the date on which the next

calibration is due.

Equipment needed to perform audiometer calibrations

Type 1 sound level meter Octave band filter set (1/3 octave, range of minimum 125 Hz to 16000 Hz) 1.

must meet Type 1 sound level meter (ANSI S1.4). Sound level meters to be checked before use with a

calibrator.

Mechanical Coupler (used for bone conduction calibration) B&K 4930 Artificial Mastoid or other 2.

mechanical coupler. Must meet ANSI S3.13.

System to measure:3.

Frequency

Rise time

Fall time

Duration

Over shoot

THD (Total Harmonic Distortion)

Piston phone or sound level meter calibrator.4.

Ear Simulator ANSI/ASA S3.7 or IEC 60318-1, Part 1: Electroacoustics - Simulators of human head

and ear - Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones

Acoustic Coupler NBS9A (6cc) ANSI/ASA S3.7, or IEC 60318-3, Part 3: Electroacoustics

Simulators of human head and ear Part 3: Acoustic coupler for the calibration of supra-aural

earphones used in audiometry.

IEC 60318-5, Electroacoustics Simulators of human head and ear Part 5: 2 cm3 coupler for the

measurement of hearing aids and earphones coupled to the ear by means of ear inserts

IEC 60318-6, Electroacoustics Simulators of human head and ear Part 6: Mechanical coupler

for the measurement of bone vibrators

Specification / calibration information for all microphones, filters, SLM, and couplers showing correction 5.

values needed to be applied to maintain accuracy.

Other couplers and adapters as stated or specified by manufacturer of the audiometer.6.

Calibration reports/sheets that demonstrate the audiometer meets the requirements and records the 7.

measurement results of the calibration.


Phasing of headphones

Before headphone calibration of DD45/TDH39 take place the phase of the speakers must be checked.

Phasing of the Headset

Start the audiometer in user mode1.

Select Left ,Tone, Rev. 125 Hz 70dBHL in channel 1.2.

Connect channel 1 of an oscilloscope to the socket on the left headphone ( set the trigger to 3.

channel 1).

Connect the Left earphone to Left output on the Audiometer and place it on the artificial ear, which 4.

again is connected to a sound level meter.

The sound level meter must be in the range 110 to 115dB.5.

Connect the channel 2 on the oscilloscope to the output of the sound level meter.6.

The oscilloscope must display both channels.7.

Looking at the oscilloscope, notice the phase difference between channel 1 and channel 2.8.

Exchange the Left earphone plug with the Right earphone plug. Replace Left earphone with Right 9.

earphone on the artificial ear

Connect channel 1 of the oscilloscope to the socket on the right speaker.10.

Looking at the oscilloscope, notice if the phase difference between channel 1 and channel 2 is the 11.

same as it was in point 8

If the phase difference is identical the headset is correct connected.12.

If not identical, the plug on the headphone must be turned 180 degrees. Make a new control to be 13.

sure that the oscilloscope picture is the same for point 8 and 11.

Calibration of test equipment

All test equipment used for the calibration of audiometers is to be calibrated annually. Calibration of all test

equipment is to be performed by a laboratory which is traceable to the National Institute of Standards and

Technology (NIST) or equivalent. Test equipment calibration documents are to be kept on file.

Calibration Mode Entering

The calibration program is activated by selecting:

Windows XP: C:\Program Files\Interacoustics\Diagnostic Suite\Calibration AD629AC40.exe

Windows 7: C\program files(X86)\Interacoustics\Diagnostic Suite\ Calibration AD629AC40.exe Follow the

instructions on the screen.


Checklist for calibration

Functional checks A /NA Pass/Fail

Visual inspection, safety - Check power cord and accessory cords for

signs of wear or damage and general physical condition of

instrument.

Headband Tension.

Cushions - Check condition; replace if needed.

Patch cords - Check plugs and leads for intermittency.

Patient response - Check for proper operation.

Pure-tone electroacoustic measurements

Frequency (Hz) - Actual measurement recorded (all frequencies).

Distortion (%) - Recorded as a percentage of THD on all frequencies.

Output levels (all transducers) - Recorded as a deviation from

standard

Linearity of all channels (all transducers) (dB) - Recorded as a

deviation from standard.

Rise/fall time (m/sec) - Actual measurement recorded.

Overshoot (dB) - Actual measurement recorded.

On/off ratio - Measured and recorded in dB down.

Crosstalk - Measured and recorded in dB down.

Pulse tones - Duration (m/sec) - Actual measurement recorded

(pass/fail).

SISI - Indicate pass or fail and deviation from standard.

Unwanted noise check - Record with (pass/fail):

Interrupter switch

Switch sounds

Mechanical sounds

Masking measurements

Narrow band noise output level - Measured and recorded as deviation

from standard, all transducers.

White noise output level - Measured and recorded as deviation from

standard, all transducers.

Speech electroacoustic measurements

Speech output level - Signal applied to input, VU meter at zero -

Measured and recorded as deviation from standard, all transducers.

Speech through external inputs - CD / tape / phono - VU meter at

zero - Measured and recorded as deviation from standard all

transducers.

Distortion - Recorded as percentage of THD.

Speech noise - Output measured and recorded as deviation from

standard.

Sound field measurements

Warble/FM output level - Actual measurement recorded (all

frequencies) as deviation from standard.

Speech inputs in sound field output level - Signal applied to input, VU

meter set at zero Measured and recorded as deviation from

standard.

Narrow band noise output level - Measured and recorded as deviation

from standard, all transducers.

Speech/white noise output level - Measured and recorded as

deviation from standard, all transducers.

Distortion - Recorded as percentage of THD.

Operation of instrument should be checked for normal function post calibration.


Calibration standard for Audiometer

Select Standard to select standard, options IEC or ANSI

Select Calibration method, to select the calibration method, options SPL mode or HL mode

SPL mode: The tab marked standard is default set to SPL (sound pressure level) so you dont have to

take the standard for the transducer you are calibrating into account. For correction of your 6cc or 2cc

coupler/microphone you have to add or subtract from the 90dB SPL level which can be read on your sound

level meter

HL mode: If you select HL (hearing level) you can perform the calibration like on a regular audiometer

where you add the standard to the HL values and then the corrections for your coupler/microphone.

Figure 1


Selecting TDH39 headset

Select Transducer Setup (Figure 2)

Select Headset phone to select TDH39 headset

Enter the serial numbers for the left and right phones in the field Left and Right

Figure 2

Calibration of TDH39

Equipment needed for TDH39 calibration:

Measuring amplifier

Acoustical IEC 60318-3 (IEC 303) coupler

Frequency counter

Correction values for coupler


Select Transducer Calibration

Place the transducer on the 6cc IEC 60318-3 (IEC 303) coupler (Figure 3)

Figure 3

Adjust the Adjustment slider until the calibration level is obtained on the measurement amplifier

(i.e. 90 dB SPL) (Figure 4)

Figure 4

Note: Remember to add or subtract the correction for your microphone

Check the frequency accuracy with a frequency counter. The accuracy has to be better than 1%

Press Next, when the calibration level is obtained, to get the next frequency


Repeat Next until all stimuli is calibrated, for both left and right transducer.


Write the calibration to Hardware

Select the Main menu (Figure 5)

Select Write to hardware

A dialog box will appear with the message Calibration data successfully written to hardware

Figure 5


Selecting DD45 headset


Select Headset phone to select DD45 headset


Figure 6

Calibration of DD45

Equipment needed for DD45 calibration:

Measuring amplifier

Acoustical IEC 60318-3 (IEC 303) coupler

Frequency counter







Figure 8





Figure 7






Figure 9


Selecting HDA200 headset


Select Headset phone and select HDA200 headset


Figure 10

Calibration of HDA200

Equipment needed for the HDA200 calibrating

Measuring amplifier

Acoustical IEC 60318-1 coupler

Frequency counter


Spacer for HDA200 to coupler IEC 60318-1



Place the transducer on the IEC 60318-1 coupler (Figure 11)

Figure 11



Figure 12




Press Next, when the Calibration level is obtained, to get the next frequency





Select the Write to hardware

A dialog box will appear with the message Calibration data successful written to hardware

Figure 13


Selecting HDA280 headset

Select the Transducer Setup (Figure 14)

Select Headset phone and select HDA280 headset

Enter the serial numbers for the left and right phone in the field Left and Right

Figure 14

Calibration of HDA280

Equipment needed for the HDA280 calibration:

Measuring amplifier

Acoustical IEC IEC 60318-3 (IEC 303) coupler

Frequency counter


Spacer for HDA280 to coupler IEC 60318-3 (IEC 303)

30 adaptor cable


Select Transducer calibration


Figure 15



Figure 16


Check the frequency accuracy with a frequency counter. The Press Next, when the calibration level is

obtained, to get the next frequency Repeat Next until all stimuli is calibrated, for both left and right


transducer.






Figure 17


Selecting EAR3A Insert phone


Select Insert phone and select EAR3A


Figure 18

Calibration of EAR3A

Equipment needed for calibration of EAR3A:

Measuring amplifier

Acoustical IEC 60318-5 (IEC126) coupler

Frequency counter


30 adaptor cable



Place the transducer on the 2cc 60318-5 (IEC126) coupler (Figure 19)

Figure 19



Figure 20










Figure 21


Selecting EAR5A Insert phone


Select Insert phone and select EAR5A


Figure 22

Calibration of EAR5A

Equipment needed for calibrating the EAR5A:

Measuring amplifier

Acoustical IEC 60318-5 (IEC126) coupler

Frequency counter


30 adaptor cable


Select the Transducer Calibration

Place the transducer on the 2cc IEC 60318-5 (IEC126) coupler (Figure 23)

Figure 23



Figure 24


Check the frequency accuracy with a frequency counter. The accuracy has to better than 1%






Figure 25


Selecting CIR22/CIR33 Insert masking transducer


Select Insert masking transducer and select CIR22/CIR33

Figure 26

Calibration of CIR22/CIR33

Equipment needed for calibrating the CIR22/CIR33:

Measuring amplifier

Acoustical IEC 60318-5 (IEC126) coupler, fitted with Eartip 10

Frequency counter




Place the transducer on the 2cc IEC60318-5 (IEC126)coupler (Figure 27)

Figure 27



Figure 28




Repeat Next until all stimuli is calibrated.






Figure 29


Selecting B71 Bone transducer


Select Bone conductor or Bone conductor 2 and select B71

Figure 30

Calibration of B71

Equipment needed for calibrating the B71:

Measuring amplifier

Artificial Mastoid IEC 60318-6

Frequency counter

Correction values for Mastoid



Place the transducer on the artificial mastoid. (Figure 31)

Figure 31



Figure 32

Note: Remember to add or subtract the correction for your Mastoid



Repeat Next until all stimuli is calibrated.






Figure 33


Calibration procedure Free Field and Custom Max

Select standard: ANSI / IEC (Figure 34)

Figure 34


Select Free field setup

Free Field Setup.

Speaker output.

Figure 35


Custom max.

If the speakers / amplifier setup is not powerful enough to stimulate with the predefined maximum output, the

maximum output can be decreased to fit the current configuration.

To use custom max, follow instructions on screen or below, read carefully before start. (Figure 36)

When custom max is not used the check mark (use custom max. values) has to be unchecked.

Figure 36

Select speaker.(Figure 37)

Select frequencies

Adjust slider until speaker is distorting or the slider is at the highest.1.

Notices max output level on the Sound level meter (SLM).2.

Type value from the SLM.3.

Select next freq.

Figure 37

2

1

3


Transducer calibration

Calibrate left and right speaker.

Figure 38


Update procedure - Firmware

New firmware will be available on the Interacoustics web site and the firmware is packaged in a zip archive.

After archiving the firmware follow the instructions below.

Unzip the firmware archive on a new FAT32 formatted USB stick.1.

Insert the USB in the unpowered AC40 instrument. 2.

Turn on the instrument and wait for the Tone test.3.

Enter Common Setting using the Setup/Tests Button.4.

Press the function key named Install, and follow the instructions on the instrument display. 5.

Wait for the instrument to return to the Tone test.6.

WARNING: The instrument will restart several times.

WARNING: Dont turn off the instrument while updating.

Installing MHA (Master Hearing Aid) wave files:

MHA/HIS wave files can be installed the following way:

Zip the selected wave files into a file named update_mha.mywavefiles.bin (make sure the file extension is 1.

bin and not zip)

Copy the files to a newly FAT32 formated USB memory stick2.

Insert the stick into one of the USB connections on the AC40.3.

Go to Common Setup and press Install4.

Wait for the installation to complete.5.

Restart the AC40.6.

AC40 Stand Alone Unit, Print Logo Update

AC40 direct printout allows results to be printed directly after testing (via a supported USB printer please contact

Interacoustics customer service for a list of supported PC printers if in doubt). The printout logo can be configured

via the audiometer itself (see below) or via the Diagnostic Suite (in the General Setup a logo impage can be

downloaded to the instrument from the PC).

Open up the Paint program1.

Open up Image Properties, by pushing the Ctrl + E keys2.

Set the Width to 945 and the Height to 190 as shown. Click on OK3.

Edit the Image and the Company data to fit inside the set area4.

Save the created file as PrintLogo.bmp5.

Zip the PrintLogo.bmp file to the following name update_user.logo.bin6.

The update_user.logo.bin file is now ready to be used

Find a USB thumb drive with at least 32MB in total size and insert it into your PC7.

Go to My Computer and right click on the USB thumb drive and select Format **Note-this will erase 8.


everything on your USB thumb drive*

Ensure that FAT32 is selected as your File System- Leave other settings as listed9.

Click Start-depending on the size of your thumb drive these may take a while. When the format is complete 10.

you will receive a pop-up indicating it has formatted successfully

Copy update_user.logo.bin file onto the formatted thumbdrive11.

It is very important that this file and only this file is present on the USB thumb drive12.

With the audiometer turned off insert the thumb drive into any available USB port13.

Turn on the instrument and push the Temp/Setup Button from the Tone test screen14.

Enter Common Settings using the Setup/Tests Button15.

For the question Do you want to install press the Yes button16.

After installation is completed, press the Back button to get to the testing screen17.

AC40 Service Manual Appendix A Page 1

Appendix A Update News

Following modifications are made for manual version 8100837 Rev 2 instruments from 10/2013

Minor visual changes to manual format

8100837_Rev 2_AC40 1060 Service manual.docx

ac40 1060 service manual

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