Accession Number : AD0876730

Title :   Low-Frequency Sound Attenuation in Open Water.

Descriptive Note : Technical publication, Jun 69-Jun 70,

Corporate Author : NAVAL UNDERSEA RESEARCH AND DEVELOPMENT CENTER SAN DIEGO CA

Personal Author(s) : Duykers, L. R. B.

Report Date : OCT 1970

Pagination or Media Count : 31

Abstract : A relaxation process, based on organic particulate matter (plankton) in open water, is described and theoretically derived. It is similar to a theoretically derived and experimentally verified process in aerosols and relates relaxation time to shear (Stokes) force. The derived formulas are applied to demonstrate probable significant differences among low-frequency sound-attenuation values in various water masses. (Author)

Descriptors :   (*UNDERWATER SOUND, SOUND TRANSMISSION), ATTENUATION, LOW FREQUENCY, PLANKTON, ABSORPTION, ORGANIC MATERIALS, VISCOSITY, TEMPERATURE, SEA WATER.

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE