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Tinnitus in noise-exposed workers

W H Phoon1, H S Lee, S E Chia

  • 1Department of Industrial Health, Ministry of Labour, Republic of Singapore.

Occupational Medicine (Oxford, England)
|February 1, 1993
PubMed
Summary
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Tinnitus, a ringing in the ears, affects nearly a quarter of noise-exposed workers with hearing loss. This condition can interfere with daily life and is linked to poorer hearing, highlighting the need for hearing conservation programs.

Area of Science:

  • Occupational Health
  • Audiology
  • Environmental Medicine

Background:

  • Noise exposure is a known cause of occupational hearing loss.
  • Tinnitus is frequently reported by individuals with noise-induced hearing impairment.
  • Limited awareness exists regarding tinnitus prevalence and its impact in noise-exposed workforces.

Purpose of the Study:

  • To determine the prevalence and characteristics of tinnitus among noise-exposed workers diagnosed with noise-induced deafness.
  • To investigate the association between tinnitus and hearing thresholds in this population.
  • To underscore the importance of tinnitus awareness in hearing conservation efforts.

Main Methods:

  • A cross-sectional study was conducted on 647 noise-exposed workers identified with noise-induced deafness.

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  • Prevalence of tinnitus was calculated.
  • Characteristics of tinnitus (laterality, frequency, associated symptoms) were documented.
  • Hearing thresholds were compared between workers with and without tinnitus, with adjustments for confounding factors.

    • Main Results:

    • The prevalence of tinnitus was 23.3% among the studied workers.
    • Tinnitus was often bilateral (42.4%) and high-frequency (44.4%).
    • Workers with tinnitus exhibited significantly higher hearing thresholds across frequencies compared to those without tinnitus, even after statistical adjustments.

    Conclusions:

    • Tinnitus is a common condition in workers with noise-induced hearing loss.
    • The presence of tinnitus correlates with more severe hearing impairment.
    • Increased awareness of tinnitus can enhance worker engagement in hearing conservation programs.