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Updated: Aug 11, 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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The relationship between noise-induced hearing loss and cognitive function.

Behnaz Rahimian1, Sara Jambarsang2, Amir Houshang Mehrparvar3

  • 1International Campus, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

Archives of Environmental & Occupational Health
|February 6, 2023
PubMed
Summary

Noise-induced hearing loss (NIHL) may negatively impact cognitive functions. This study found that workers with NIHL likely have reduced working memory capacity compared to those without hearing loss.

Keywords:
AttentionNIHLcognitive functionresponse timeworking memory

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Area of Science:

  • Audiology
  • Neuroscience
  • Occupational Health

Background:

  • Noise-induced hearing loss (NIHL) is a prevalent occupational hazard.
  • Cognitive functions, including working memory, attention, and response time, may be affected by NIHL.
  • Understanding the relationship between NIHL and cognitive function is crucial for worker well-being.

Purpose of the Study:

  • To investigate the association between NIHL and specific cognitive domains.
  • To compare working memory, attention, and response time in noise-exposed workers with and without NIHL.

Main Methods:

  • A cross-sectional study involving 154 male textile workers exposed to noise levels exceeding 85 dBA.
  • Participants were categorized into two groups: those with NIHL and those without.
  • Cognitive function was assessed using the Wechsler working memory test and the Stroop color-word test.

Main Results:

  • The NIHL group exhibited higher working memory scores and response times, and a lower interference score compared to the non-NIHL group.
  • Only the difference in working memory was statistically significant.
  • Adjustments for age and work history did not alter the significance of the findings.

Conclusions:

  • Middle-aged male workers with NIHL demonstrated a potentially reduced working memory span.
  • NIHL may be associated with impairments in specific cognitive functions.
  • Further research is warranted to elucidate the complex relationship between noise exposure, hearing loss, and cognitive decline.