Propagation of two simple acoustic transients in an isovelocity layer with perfectly-reflecting boundaries
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Authors
Miller, Alan Charles
Wendt, George Frederick
Subjects
Acoustic transients
Isovelocity layer
Mylar transducer
Lommel function
Laplace transform
Perfectly-reflecting boundaries
Radially symmetric propagation
Isovelocity layer
Mylar transducer
Lommel function
Laplace transform
Perfectly-reflecting boundaries
Radially symmetric propagation
Advisors
Coppens, Alan B.
Date of Issue
1967-06
Date
June 1967
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
The propagation of simple acoustic transients in an isovelocity water layer was investigated for the purpose of studying a relationship between the propagation of transients in ducts and in layers. The Laplace transform method was used to obtain approximate solutions for the acoustic pressure, particle velocity, and particle displacement resulting from a step-function input in velocity and the particle velocity resulting from a gated sine-wave input in velocity. Computer programs were written to evaluate and graph the resulting waveforms. The waveforms resulting from step-function and gated sine-wave inputs in velocity were observed and compared with the predicted waveforms. With the use of Mylar transducers, good correlation was obtained in the region of validity of the theoretical solutions. It was found that previously published solutions for the propagation of transients in ducts became the leading terms of the associated solutions for the layer
Type
Thesis
Description
Series/Report No
Department
Department of Physics
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
120 p.: ill.
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.