Near‐horizontal propagation of sound over grassland
作者:
J. E. Piercy,
R. J. Donato,
T. F. W. Embleton,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1976)
卷期:
Volume 60,
issue S1
页码: 2-2
ISSN:0001-4966
年代: 1976
DOI:10.1121/1.2003267
出版商: Acoustical Society of America
数据来源: AIP
摘要:
An extensive set of published measurements of the propagation of noise from jet aircraft on the ground across an airport for differing weather conditions is compared with predictions using modern propagation theory from values of ground impedance, assuming an acoustically homogeneous atmosphere. When the atmosphere is in fact reasonably homogeneous under neutral weather conditions, there is quantitative agreement between calculated and measured behavior. The intricate pattern of acoustic behavior, as a function of frequency and distance, produced by inhomogeneous atmospheric conditions (gradients of wind temperature turbulence) is explained qualitatively by the appropriate modes of propagation revealed by the theory. The role of surface and sky waves in particular is illustrated.
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