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A Low Cost Setup for Behavioral Audiometry in Rodents
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Ambient Noise Monitoring during Pure-Tone Audiometry.

Robert H Margolis1, George L Saly1, Richard H Wilson2

  • 1Audiology Incorporated, Arden Hills, Minnesota.

Journal of the American Academy of Audiology
|July 11, 2022
PubMed
Summary
This summary is machine-generated.

Modified hearing test noise limits and distraction effects were studied. Distracting noise, unlike masking, impacts pure-tone audiometry accuracy and requires more trials, but does not affect test time.

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Area of Science:

  • Audiology
  • Environmental Acoustics
  • Occupational Health

Background:

  • Need for hearing tests outside sound booths is growing.
  • Ambient noise can skew pure-tone audiometry results through masking and distraction.
  • Distraction effects on adult pure-tone audiometry are not well-studied.

Purpose of the Study:

  • Modify maximum permissible ambient noise levels (MPANLs) for circumaural earphones.
  • Develop rules to identify ambient noise masking effects.
  • Investigate distracting noise effects on pure-tone thresholds.

Main Methods:

  • Modified existing MPANLs for circumaural earphones.
  • Developed rules for identifying masking effects.
  • Measured pure-tone thresholds in quiet and distracting industrial noise.
  • Assessed effects on trial time, trials needed, threshold shift, and perceived distractibility.

Main Results:

  • Modified MPANLs offer more accurate ambient noise effect assessment.
  • Distracting noise increased trials needed and threshold shift.
  • Distracting noise level correlated with perceived distractibility.
  • Test time per trial remained unaffected by distracting noise.

Conclusions:

  • Modified MPANLs improve ambient noise evaluation for audiometry.
  • Distracting noise impacts pure-tone thresholds differently than masking.
  • The contaminating effects of distracting noise can be quantified.