Near grazing scattering by slight rough surfaces
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Authors
Bailie, James Matthew
Subjects
Advisors
Medwin, H.
Date of Issue
1978-12
Date
December 1978
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
It has been predicted that point source radiation which is at near-grazing incidence to a slightly rough surface generates a boundary wave in the fluid as well as the better known volume wave (I. Tolstoy, J. Acoust. Soc. Am., 63, S60, (1978)). Anechoic chamber experiments, using a surface constructed of rigid hemispheres on a rigid plate, have been performed to compare with theory. The experiments confirm that the relative boundary wave amplitude to volume wave amplitude increases as the 3/2 power of the sound frequency when the source and receiver are on the boundary. However, the predicted r 1/2 growth with range reaches a limit at kr~100. For the receiver above the rough surface the experimental values of the scattered sound show some agreement with theoretical predictions.
Type
Thesis
Description
Series/Report No
Department
Department of Physics and Chemistry
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
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Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.