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Related Concept Videos

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Related Experiment Video

Updated: May 20, 2025

Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
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Is Noise Exposure Associated With Impaired Extended High Frequency Hearing Despite a Normal Audiogram? A Systematic

Sajana Aryal1, Monica Trevino1, Hansapani Rodrigo2

  • 1University of Texas at Austin, Austin, TX, USA.

Trends in Hearing
|May 16, 2025
PubMed
Summary

Extended high-frequency hearing loss (9-20 kHz) can indicate early noise exposure, even with normal hearing in lower frequencies (≤8 kHz). Occupational noise showed a stronger link to this damage than recreational noise.

Keywords:
extended high frequencymeta-analysisnoise exposurenoise-induced hearing losssubclinical damage

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Area of Science:

  • Audiology
  • Occupational Health
  • Environmental Health

Background:

  • Noise-induced auditory damage is a growing concern.
  • Animal models indicate the cochlear base is vulnerable to noise.
  • Early noise exposure may cause basal cochlear dysfunction undetected by standard audiograms.

Purpose of the Study:

  • To investigate the association between noise exposure and hearing in extended high frequencies (9-20 kHz) in humans.
  • To identify early markers of noise-induced auditory damage.

Main Methods:

  • Systematic review and meta-analysis following PRISMA guidelines.
  • Included 30 studies with ~2,500 participants with normal audiograms (≤8 kHz).
  • Analyzed occupational and recreational noise exposure effects on hearing thresholds from 9-20 kHz.

Main Results:

  • Significant positive association between occupational noise and hearing thresholds at 9-16 kHz (medium to large effect sizes).
  • Recreational noise showed a less consistent association with hearing thresholds.
  • Publication bias was noted at 10 kHz.

Conclusions:

  • Extended high-frequency hearing thresholds (above 8 kHz) may signal early noise exposure effects.
  • Further longitudinal studies with noise dosimetry are needed to confirm causality.
  • Extended high-frequency audiometry could be clinically useful for early detection.