Accession Number : AD0745630

Title :   Backscattering of Underwater Sound in Saanich Inlet, British Columbia, Including Observations of Scattering from a Fish School,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT PACIFIC VICTORIA (BRITISH COLUMBIA)

Personal Author(s) : Scrimger,J. A. ; Turner,R. G. ; Heyd,G. J. H.

Report Date : 30 AUG 1972

Pagination or Media Count : 9

Abstract : The frequency dependence of acoustic volume backscattering strength has been measured at depths of 100, 200, 300, and 400 ft in Saanich Inlet, British Columbia, Canada, over a 24-h period. The measurements were made for comparison with open-ocean (Pacific) results, as the biology of the inlet has been extensively studied, and it serves to some extent as a reference water volume. In the course of carrying out the above measurements, the backscattering spectral characteristics and strength of a school of young hake, of apparent mean size of 11 in., was obtained. (Author)

Descriptors :   (*UNDERWATER SOUND, BACKSCATTERING), (*ACOUSTIC DETECTION, FISHES), PACIFIC OCEAN, MARINE BIOLOGY, POWER SPECTRA, CANADA

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE