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Related Concept Videos

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The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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The Acoustic Test Environment for Hearing Testing.

Robert H Margolis1,2, Brandon Madsen1

  • 1University of Minnesota, Department of Otolaryngology, Minneapolis, MN.

Journal of the American Academy of Audiology
|September 30, 2015
PubMed
Summary
This summary is machine-generated.

Expensive sound rooms may not be necessary for accurate hearing tests. Less costly methods, including clinic space planning and sound treatments, can effectively increase access to audiology testing.

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Area of Science:

  • Audiology
  • Acoustics
  • Hearing Science

Background:

  • Traditional audiology clinics utilize costly sound rooms for hearing tests.
  • The necessity and benefit of these soundproof enclosures are often unexamined.
  • Alternative, more affordable methods could improve hearing test accessibility.

Purpose of the Study:

  • To evaluate the necessity and effectiveness of sound rooms in audiology.
  • To analyze audiometric test ranges across different earphone and room configurations.

Main Methods:

  • Acoustic measurements were taken in four distinct rooms.
  • The sound attenuation properties of five earphone designs were analyzed.
  • Maximum permissible ambient noise levels and audiometric test ranges were determined based on measurements and calculations.

Main Results:

  • The minimum hearing test levels varied from -10 to 20 dB HL across different room/earphone combinations and frequencies.
  • Calculated noise levels reaching the ear were compared against established standards (ANSI S3.1-1999).

Conclusions:

  • The efficacy of expensive, prefabricated sound rooms is questionable when considering the achievable hearing test ranges.
  • Cost-effective strategies, such as strategic clinic space planning, sound treatments, and appropriate earphone selection, can facilitate accurate hearing testing in various environments.