Accession Number : AD0751664

Title :   The Contribution of the External Auditory Meatus to Human Auditory Sensitivity.

Descriptive Note : Technical rept.,

Corporate Author : FLORIDA UNIV GAINESVILLE COMMUNICATION SCIENCES LAB

Personal Author(s) : Hollien,Harry ; Rothman,Howard B. ; Feinstein,Stephen

Report Date : 01 JUL 1972

Pagination or Media Count : 15

Abstract : Support for, and a refinement of, the hypothesis that divers hear primarily by bone conduction was provided by Hollien and Brandt. To further test this hypothesis, the thresholds of seven submerged listeners were obtained (at frequencies of 0.25, 0.50, 1.0, 4.0 and 8.0 kHz) under three different conditions: (1) while they wore a full 3/16 in. wet suit with no hood, (2) while wearing a full 3/16 in. wet suit with a 3/16 in. hood and (3) while wearing a full 3/16 in. wet suit and hood with 1/4 in. rubber tubes passing through the hood to the external auditory meatuses. There were no significant differences between the conditions involving the use of a hood but thresholds were significantly lower in the middle and high frequencies for the no-hood condition. These findings provide further support for the hypothesis that underwater sound energy is transduced by bone conduction rather than by the normal middle ear linkage. (Author)

Descriptors :   (*AUDITORY PERCEPTION, *UNDERWATER SOUND), EAR, SENSITIVITY, BONES, SOUND TRANSMISSION, DIVING, SENSES(PHYSIOLOGY)

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE