Impulse wave diffraction by rigid wedges and plates

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Author
Bremhorst, Joseph Henry
Date
1978-12Advisor
Medwin, H.
Second Reader
Tolstoy, Ivan
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The problem of diffraction of acoustic signals by rigid barriers is studied empirically. Backward and forward diffraction from a 90 degree wedge and a thin plate are analyzed. Attempts to measure the diffracted energy in the illuminated region over the apex of the barrier, where direct and reflected signals coexist with diffracted, are discussed. Factors influencing the choice of the barriers' physical dimensions and composition are listed, as are the problems surrounding the selection of an ideal sound source and receiver. Finally, the data are compared to the theory by Biot and Tolstoy (Journal of the Acoustical Society of America, v. 29, 1957) and found to be in good agreement with predictions. (Author)
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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.Collections
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