Accession Number : AD0717295

Title :   Underwater Sound Localisation in Man,

Corporate Author : COPENHAGEN UNIV (DENMARK)

Personal Author(s) : Andersen,Soren ; Cristensen,Hans Thoft

Report Date : 1969

Pagination or Media Count : 5

Abstract : Directional hearing under water was examined in 7 skindivers at 1, 2, 4, 8, and 16 kc/s. The experiment was performed twice, in a free field station and in a harbour enclosure. Divers judged the direction 'left' or 'right' of the median plane, of a pure-tone burst of 1 sec, coming from one of two transducers placed in front of them at the angles plus or minus 10, 15, 20, 30, 45, and 90 degrees. The results showed great individual variation. Directional hearing under water seems to work on the same parameters as in the air, with allowances for the longer wavelength in water. At 1 kc/s, time/phase cues seem to be effective, and above 4 kc/s directional hearing is supported by intensity differences. Performance improved with increasing frequency from 2-16 kc/s. (Author)

Descriptors :   (*UNDERWATER SOUND, POSITION FINDING), HUMANS, UNDERWATER, AUDITORY PERCEPTION, SOUND, PERCEPTION, DIVING, DENMARK

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE