Coherent and incoherent components of sound scattered at a time dependent rough surface
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Authors
Clay, Clarence Samuel
Subjects
Rough-surface transmission, sound scattering, coherent reflection.
Advisors
Date of Issue
1972-12-31
Date
12/31/1972
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Theoretical expressions are derived for the sound scattered at a time-dependent rough surface. The calculations are made for a Gaussian shaded source transducer and point receiver. The Helmholtz theorem and Fresnel approximation are used. The rough surface is assumed to be a traveling wave and to have a traveling wave packet type of correlation function. The coherent component of the signal is the product of the Fourier transformation of the surface distribution function and the smooth surface reflection signal. Comparison of theory and experiment shows the coherent component to be sensitive to the non-Gaussian character of the wind-blown water waves. The incoherent components and the temporal correlation function of the scattered sound are given
Type
Technical Report
Description
Series/Report No
Department
Physics and Chemistry
Identifiers
NPS Report Number
NPS-61MD72121A
Sponsors
Funder
Sponsoring military activity: Naval Postgraduate School, Monterey, California 93940.
Format
39 p. : ill. ; 28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.