Analysis of Surface‐Reflected/Bottom‐Reflected Ray Transmissions in Constant‐Velocity‐Gradient Media
作者:
M. J. Jacobson,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1965)
卷期:
Volume 37,
issue 5
页码: 885-893
ISSN:0001-4966
年代: 1965
DOI:10.1121/1.1909470
出版商: Acoustical Society of America
数据来源: AIP
摘要:
This paper complements an earlier study of refracted/bottom‐reflected rays by the author and considers surface‐reflected/bottom‐reflected transmissions in a model ocean having a horizontal surface and bottom and sound velocity that decreases linearly with depth. The case of increasing velocity is implicit since transmissions in media with velocity gradients +gand −gare geometrically equivalent. The paper is concerned primarily with an analysis of spreading loss. General expressions are derived for spreading loss, range, and travel time, and the problem of multiple arrivals at a fixed receiving point is examined. The spreading loss along a ray is considered in detail after the ray has experienced many reflections. Detailed results are presented for the case of a bottomed source and receiving point, and these are compared with the corresponding results for refracted/bottom‐reflected transmissions.
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