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ANSI S3.6-2004
Specification For Audiometers


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General Product Information

Document Type Standard
Status Superseded
Publisher:    Acoustical Society of America
Committee S3
Superseded By:
ANSI S3.6-2010



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Published:   13 May 2004  
Pages: 61
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Hardcopy
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Published:   13 May 2004  
Delivery Time:   3-5 days
Pages: 61

Table of Contents

1  Scope
   1.1  Scope
   1.2  Purpose
   1.3  Applications
2  Normative references
3  Terms and definitions
4  Requirements for specific types of audiometers
   4.1  Type designation
5  General requirements
   5.1  Electrical Safety requirements
   5.2  Acoustic Safety requirements
   5.3  Power supply variation and environment conditions
        5.3.1  Mains operation
        5.3.2  Electrostatic or electromagnetic interference
        5.3.3  Battery operation
        5.3.4  Operating ranges for temperature and humidity 
        5.3.5  Test for conformity
   5.4  Unwanted acoustic signals
        5.4.1  General
        5.4.2  Unwanted sounds from an earphone
        5.4.3  Unwanted sound from a bone vibrator
        5.4.4  Unwanted sound from an audiometer
   5.5  Subject response system
   5.6  Monitor earphone or loudspeaker
   5.7  Talk back system
6  Signal sources
   6.1  Pure-tone source
        6.1.1  Frequencies and hearing levels
        6.1.2  Rate of frequency change
        6.1.3  Frequency modulated signals
        6.1.4  Frequency accuracy
        6.1.5  Harmonic distortion
   6.2  Speech source
        6.2.1  Clinical significance of speech audiometry
        6.2.2  Free-field equivalent earphone output level
        6.2.3  Uncorrected earphone output level
        6.2.4  Loudspeaker output level
        6.2.5  Free-field equivalent bone vibrator output level
        6.2.6  Frequency response
        6.2.7  Frequency response for recorded speech
        6.2.8  Frequency response for microphone input 
        6.2.9  Overall distortion
        6.2.10 Monitoring meter
        6.2.11 Sound pressure level of speech signals
        6.2.12 Standard reference sound pressure level for 
               speech
   6.3  Masking sounds
        6.3.1  Narrow-band noise
        6.3.2  White noise
        6.3.3  Weighted random noise for the masking of speech
7  Signal level controls
   7.1  Marking
   7.2  Accuracy of sound pressure and vibratory force level
   7.3  Hearing level control
        7.3.1  Increments
        7.3.2  Bekesy or automatic recording audiometers
        7.3.3  Hearing level control linearity
   7.4  Masking sound level control
        7.4.1  Reference levels
        7.4.2  Accuracy of masking sound level
        7.4.3  Maximal and range of adjustment of masking sound 
               levels
   7.5  Tone switching
        7.5.1  Tone switch for manual audiometers
        7.5.2  On/Off ratio for audiometers
        7.5.3  Rise/fall times for audiometers
        7.5.4  Pulsed tones for audiometers
        7.5.5  Computer controlled, Bekesy, and automatic 
               audiometers
8  Reference-signal facilities
   8.1  Frequencies
   8.2  Reference-signal level control
        8.2.1  Range
        8.2.2  Increments
        8.2.3  Accuracy
        8.2.4  Operation
9  Transducers (specifications, RETSPLs and RETFLs)
   9.1  Air conduction, supra-aural earphones
        9.1.1  Characteristics of supra-aural earphones
        9.1.2  Calibration
   9.2  Air conduction, circumaural earphones
        9.2.1  Headband
   9.3  Air conduction, insert earphones
        9.3.1  Reference levels in a occluded ear simulator
        9.3.2  Reference levels in an HA-2 acoustic coupler 
               with rigid tube attachment
        9.3.3  Reference levels in an HA-1 acoustic coupler
   9.4  Bone conduction
        9.4.1  Bone vibrators
        9.4.2  Headband
        9.4.3  Reference equivalent threshold force levels 
               (RETFLs)
   9.5  Sound field produced via loudspeakers
        9.5.1  Sound field characteristics
10 Device marking and instruction manual
   10.1 Marking
   10.2 Instruction manual
Annex A
Annex B
Annex C
  C.1 General
  C.2 Calibration
  C.3 Microphone
  C.4 Adapters for making extended high frequency measurements 
      on an IEC 60318-2 artificial ear
  C.5 Coupler configurations using a Type 1 adapter
  C.6 Coupler configuration using a Type 2 adapter
  C.7 Environmental conditions 
  C.8 References
Annex D
  D.1 General
  D.2 Probe tube method
  D.3 Loudness-balance method
  D.4 Threshold-determination method
  D.5 Standard reference earphone with other than specified 
      coupler
  D.6 Standard earphones with other than specified cushions
  D.7 Earphone and coupler both different from standard types
Annex E
  E.1 General
  E.2 Reference levels
  E.3 Vertical scale
  E.4 Horizontal scale
  E.5 Scale proportions
Annex F

Abstract

Includes specifications and tolerances for audiometers and standard reference threshold levels for audiometric transducers such as supra-aural, circumaural, and insert earphones, bone vibrators, and loudspeakers. Classifies audiometers according to the type of signal generated (pure tones, speech, or both), mode of operation, and complexity or range of auditory functions tested.

History

2004 [13/05/2004]
96 [01/04/1996]
89
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