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Related Experiment Videos

Navy hearing conservation program: hearing threshold comparisons to Navy SEALS and divers.

B Bohnker1, G Rovig, J Page

  • 1Navy Environmental Health Center, 620 John Paul Jones Circle, Suite 1100, Portsmouth, VA 23708, USA.

Undersea & Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc
|September 11, 2003
PubMed
Summary
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Navy special operations personnel, including Sea-Air-Land (SEALS) and divers, show distinct hearing threshold risks. SEALS face higher risks at 4000 Hz, while both groups have lower risks in specific frequency ranges.

Area of Science:

  • Occupational health
  • Auditory science
  • Military medicine

Background:

  • Hearing loss is a significant concern for military personnel due to occupational noise exposure.
  • Understanding specific risks for special operations forces is crucial for effective hearing conservation programs.

Purpose of the Study:

  • To compare hearing thresholds between Navy special operations personnel (SEALS and divers).
  • To identify specific frequency ranges and risk levels associated with each group.

Main Methods:

  • Hearing threshold data collected from 212 SEALS and 165 divers.
  • Age adjustment of hearing threshold values using Mantel Haenzel Weighted odds ratio (MHOR).
  • Comparison with the Navy Hearing Conservation Database.

Related Experiment Videos

Main Results:

  • SEALS showed significantly lower risk for thresholds above 20 dB (500-3000 Hz) in the right ear (MHOR=0.54, p=0.022).
  • Divers showed significantly lower risk for thresholds above 20 dB (500-3000 Hz) in the left ear (MHOR=0.61, p=0.047).
  • SEALS exhibited significantly higher risk for thresholds above 40 dB at 4000 Hz in both ears (left MHOR=2.03, p=0.0043; right MHOR=2.58, p=0.000089), while divers did not differ.

Conclusions:

  • Hearing risk profiles differ between SEALS and divers, particularly at 4000 Hz.
  • Risk assessment must account for unique mission demands and exposure hazards.
  • Acceptability of hearing risks may be determined by mission requirements in hazardous environments.