Accession Number:

AD0745630

Title:

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

Descriptive Note:

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT PACIFIC VICTORIA (BRITISH COLUMBIA)

Personal Author(s):

• Scrimger,J. A.
• Turner,R. G.
• Heyd,G. J. H.

Report Date:

1972-08-30

Pagination or Media Count:

9.0

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