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Hearing thresholds among young professional divers: a 6-year longitudinal study.

Marit Skogstad1, Tor Haldorsen, Atle R Arnesen

  • 1National Institute of Occupational Health, Oslo, Norway. Marit.Skogstad@stami.no

Aviation, Space, and Environmental Medicine
|April 15, 2005
PubMed
Summary

Young professional divers may experience mild hearing loss due to occupational noise exposure. This study tracked hearing changes in divers over six years, finding some threshold shifts, particularly at higher frequencies.

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Area of Science:

  • Occupational health
  • Audiology
  • Marine biology

Background:

  • Diving involves significant pressure and noise exposure, potentially impairing hearing.
  • Young professional divers are a specific cohort at risk for noise-induced hearing loss.

Purpose of the Study:

  • To investigate the relationship between cumulative diving exposure and changes in hearing thresholds in young professional divers.
  • To assess long-term hearing changes in divers over a six-year period.

Main Methods:

  • Prospective follow-up study of 47 male professional divers from the start of their education.
  • Audiograms were conducted at baseline, 1, 3, and 6 years, measuring pure tone air conduction thresholds (0.25-8.0 kHz).
  • Annual hearing threshold changes were calculated using linear regression; divers were grouped by exposure (low vs. high).

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Main Results:

  • Divers' hearing was initially better than the general population but showed significant reductions at 4 kHz and 8 kHz after 6 years.
  • Thresholds increased significantly at several frequencies (0.5-6 kHz) in both ears.
  • No significant difference in hearing changes was observed between high- and low-exposure groups.

Conclusions:

  • Young professional divers may develop mild hearing impairment due to occupational noise exposure.
  • The study highlights the potential for cumulative noise exposure to affect hearing in this population.