Accession Number:

AD0691403

Title:

UNDERWATER HEARING IN MAN: 1. SENSITIVITY

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT

Personal Author(s):

Report Date:

1969-02-28

Pagination or Media Count:

31.0

Abstract:

All available research on the underwater hearing sensitivity of man is reviewed. New data on the underwater hearing of divers with known AC and BC levels are presented. It is concluded that Man suffers a loss of sound pressure sensitivity upon immersion Underwater hearing sensitivity is frequency dependent with peak sensitivity being about 61 to 64 dB above .0002 decibels per square centimeter at 1 kiloHertz Air conduction auditory deficiencies are not reflected in underwater hearing levels unless the air conduction deficiencies are accompanied by bone conduction deficiencies Wet suit diving hoods reduce underwater sensitivity to sound by about 25 to 35 dB at frequencies of 1 kiloHertz and higher.

Subject Categories:

  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE