Accession Number : AD0761212

Title :   Psychoacoustic and Electrophysiologic Studies of Hearing Under Hyperbaric Pressure.

Descriptive Note : Summary rept. 1 Jun 70-31 May 73,

Corporate Author : NORTH CAROLINA UNIV CHAPEL HILL AUDITORY RESEARCH LAB

Personal Author(s) : Thomas,William G. ; Farmer,Joseph C.

Report Date : 01 JUN 1973

Pagination or Media Count : 61

Abstract : Work performed includes: calibration of laboratory standard Type-L condenser microphones to a simulated depth of 990 feet (31 ATA); Calibration of standard audiometric earphones to a simulated depth of 990 feet (31 ATA); and, measurement of human auditory thresholds during deep, saturation dives in helium-air. Human threshold data were collected at numerous depths during compression and decompression for air conduction and bone conduction to a simulated depth of 990 feet (31 ATA). Electrophysiological measurements were recorded from experimental animals under similar conditions. (Modified author abstract)

Descriptors :   (*HEARING, PRESSURE), STRESS(PHYSIOLOGY), PSYCHOACOUSTICS, ELECTROPHYSIOLOGY, DIVING, MICROPHONES, CALIBRATION, AUDIOMETRY, THRESHOLDS(PHYSIOLOGY)

Subject Categories : Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE