Accession Number : AD0624753

Title :   AUDITORY FATIGUE UNDERWATER AT 1900 CYCLES PER SECOND.

Descriptive Note : Memo. rept.,

Corporate Author : NAVAL SUBMARINE MEDICAL CENTER GROTON CONN

Personal Author(s) : Smith,Paul F.

Report Date : 02 JUL 1965

Pagination or Media Count : 5

Abstract : The objective of the research was to determine whether or not divers may safely be exposed to intense underwater signals at 1900 cycles per second. It was found that divers wearing standard wet suits with hoods can safely enter the water in the presence of signals of 1900 cycles per second at signal level at least up to 169 decibels re .0002 microbar (95 db re 1 microbar) and remain at least 30 minutes, under conditions of pulse length and duty cycle similar to those used in this study. This information will eventually be useful in establishing safe working distances for Navy divers from sonar transducers transmitting at 1900 cycles per second. More intense levels would be necessary to establish a Damage Risk Criterion. (Author)

Descriptors :   (*FATIGUE(PHYSIOLOGY), UNDERWATER SOUND), (*UNDERWATER SOUND, FATIGUE(PHYSIOLOGY)), AUDIO FREQUENCY, UNDERWATER SOUND SIGNALS, DIVING, UNDERWATER CLOTHING, SONAR EQUIPMENT, TRANSDUCERS, THRESHOLDS(PHYSIOLOGY)

Subject Categories : Stress Physiology
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE