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Long-range sound propagation: A review of some experimental dataThree experimental studies of long range sound propagation carried out or sponsored in the past by NASA are briefly reviewed to provide a partial prospective for some of the analytical studies presented in this symposium. The three studies reviewed cover (1) a unique test of two large rocket engines conducted in such a way as to provide an indication of possible atmospheric scattering loss from a large low-frequency directive sound source, (2) a year-long measurement of low frequency sound propagation which clearly demonstrated the dominant influence of the vertical gradient in the vector sound velocity towards the receiver in defining excess sound attenuation due to refraction, and (3), a series of excess ground attenuation measurements over grass and asphalt surfaces replicated several times under very similar inversion weather conditions.
Document ID
19910007370
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sutherland, Louis C.
(Sutherland (Louis C.) Rancho Palos Verdes, CA, United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1990
Publication Information
Publication: NASA, Langley Research Center, 4th International Symposium on Long-Range Sound Propagation
Subject Category
Acoustics
Accession Number
91N16683
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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