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

Report Date:

1972-07-01

Pagination or Media Count:

15.0

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 316 in. wet suit with no hood, 2 while wearing a full 316 in. wet suit with a 316 in. hood and 3 while wearing a full 316 in. wet suit and hood with 14 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

Subject Categories:

  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE