Accession Number : AD0715566

Title :   Transmission of Sound Through a Randomly Rough Air-Sea Interface.

Descriptive Note : Thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Hagy,James Dixon , Jr

Report Date : SEP 1970

Pagination or Media Count : 129

Abstract : The Helmholtz integral and the Kirchhoff approximation have been used to develop predictions for the transmission of sound through a rough air-sea interface. A model study was conducted with wind-driven surfaces generated in a large anechoic tank. The frequencies used were scaled to be equivalent to low audio frequencies with moderate seas. The coherent component of the transmitted acoustic intensity was tested for exponential decrease with increasing values of the roughness parameter. An empirical correction factor was determined to give a corrected roughness. (Author)

Descriptors :   (*UNDERWATER SOUND, SOUND TRANSMISSION), (*SOUND TRANSMISSION, INTERFACES), SURFACE ROUGHNESS, RANDOM VARIABLES, UNDERWATER SOUND, ACOUSTICS, APPROXIMATION(MATHEMATICS), THESES

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE