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Related Experiment Video

Updated: Jun 5, 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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Developing and validating a risk assessment method for noise-induced hearing loss in workers.

Milad Abbasi1, Saeid Yazdanirad2,3, Ali Ahmadi4

  • 1Social Determinants of Health Research Center, Saveh University of Medical Sciences, Saveh, Iran.

Heliyon
|December 5, 2024
PubMed
Summary

A new index effectively assesses noise-induced hearing loss (NIHL) risk in workers. This method, incorporating occupational and leisure noise, personal protective equipment (PPE), and individual factors, accurately predicts hearing damage.

Keywords:
Hearing lossNoiseRisk assessmentStructural equational modeling

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Area of Science:

  • Occupational Health
  • Audiology
  • Risk Assessment

Background:

  • Noise-induced hearing loss (NIHL) is a significant occupational hazard.
  • Existing risk assessment methods may not fully capture NIHL complexities.

Purpose of the Study:

  • To develop and validate a novel risk assessment index for NIHL.
  • To identify key risk factors contributing to NIHL in industrial workers.

Main Methods:

  • Cross-sectional study with 220 steel manufacturing workers.
  • Data collection via questionnaires, sound pressure level measurements (ISO 9612), and pure tone audiometry.
  • Development of a new index incorporating occupational noise, leisure noise, PPE usage, and individual factors.

Main Results:

  • Individual factors (work experience, age, smoking, diseases) showed indirect effects (0.056–0.266).
  • Noise exposure (occupational and leisure) had strong coefficients (0.660–0.687).
  • PPE factors (use, NRR, awareness) had coefficients ranging from 0.127–0.194.
  • The novel index explained 74% of hearing loss variance.
  • Optimal cut-off values categorized risk into four levels.

Conclusions:

  • The developed index demonstrates strong validity in predicting NIHL.
  • A comprehensive approach considering multiple risk factors is crucial for effective NIHL assessment.
  • The findings support the implementation of this novel index for proactive hearing conservation programs.