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Reconsidering the limits of normal hearing.

F N Martin1, C A Champlin

  • 1Department of Communication Sciences and Disorders, The University of Texas at Austin, 78712, USA.

Journal of the American Academy of Audiology
|February 24, 2000
PubMed
Summary

The upper limit for normal hearing sensitivity should be lowered to 15 dB HL. This change acknowledges that many individuals with hearing levels below 25 dB HL experience difficulties, validating their concerns.

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Area of Science:

  • Audiology
  • Hearing Science

Background:

  • The traditional upper limit of normal hearing sensitivity is 25 dB HL.
  • A significant number of individuals with hearing levels below 25 dB HL report subjective hearing difficulties.

Purpose of the Study:

  • To propose redefining the upper limit of normal hearing sensitivity to 15 dB HL.
  • To address the discrepancy between audiological standards and self-reported hearing issues.

Main Methods:

  • Review of historical audiological philosophies regarding hearing sensitivity.
  • Analysis of self-reported hearing difficulties in individuals with hearing levels below 25 dB HL.

Main Results:

  • Current standards may not fully capture the audiological reality for individuals with slight hearing loss.

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  • Reclassifying individuals with hearing levels between 15 and 25 dB HL could validate their experiences.

    • Conclusions:

    • Lowering the threshold for normal hearing to 15 dB HL is recommended.
    • This adjustment would better align clinical assessments with patient-reported outcomes.
    • Improved counseling and support for individuals with mild hearing impairments can be facilitated.