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Local principles of wave propagation in inhomogeneous mediaFour local principles are proven for waves propagating in a layered medium with a variable wave speed. These principles are (1) that inhomogeneities increase the amplitude of waves generated by a source of fixed strength, (2) that inhomogeneities reduce spatial oscillation, or increase the wavelength, (3) that inhomogeneities decrease transmission, or increase reflection, and (4) that transmission increases monotonically with frequency. Definitions of inhomogeneity, local wave function, and local reflection and transmission coefficients are made as a basis for stating these principles.
Document ID
19930066367
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gingold, Harry
(NASA Langley Research Center Hampton, VA, United States)
She, Jianming
(West Virginia Univ. Morgantown, United States)
Zorumski, William E.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Acoustical Society of America, Journal
Volume: 93
Issue: 2
ISSN: 0001-4966
Subject Category
Acoustics
Accession Number
93A50364
Distribution Limits
Public
Copyright
Other

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