声散射与光学定理的 "失败"。

IF 2.1 2区物理与天体物理 Q2 ACOUSTICS

Journal of the Acoustical Society of America Pub Date : 2024-11-01 DOI:10.1121/10.0034427

P A Martin

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引用次数: 0

摘要

对于障碍物的平面波散射，光学定理将散射截面与前进方向的远场散射场联系起来。当入射场不是平面波时，这一简单有用的结果就不成立了。我们对这种 "失效 "进行了探讨。对于球体的散射，得到了适用于任意入射场的散射截面的明确公式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Acoustic scattering and "failure" of the optical theorem.

For plane wave scattering by an obstacle, the optical theorem relates the scattering cross section to the far-field scattered field in the forward direction. This simple and useful result fails to hold when the incident field is not a plane wave. "Failures" of this kind are explored. For scattering by a sphere, an explicit formula for the scattering cross section is obtained, applicable to arbitrary incident fields.

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来源期刊

Journal of the Acoustical Society of America 物理-声学

CiteScore

4.60

自引率

16.70%

发文量

1433

审稿时长

4.7 months

期刊介绍： Since 1929 The Journal of the Acoustical Society of America has been the leading source of theoretical and experimental research results in the broad interdisciplinary study of sound. Subject coverage includes: linear and nonlinear acoustics; aeroacoustics, underwater sound and acoustical oceanography; ultrasonics and quantum acoustics; architectural and structural acoustics and vibration; speech, music and noise; psychology and physiology of hearing; engineering acoustics, transduction; bioacoustics, animal bioacoustics.