Local Radiation Impedance of Vibrating Prolate Spheroids
作者:
Gerald C. Lauchle,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1972)
卷期:
Volume 51,
issue 3B
页码: 1106-1109
ISSN:0001-4966
年代: 1972
DOI:10.1121/1.1912932
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Prolate spheroidal coordinates and associated prolate spheroidal wave functions have been used to study the sound radiation from arbitrarily vibrating prolate spheroids. A local radiation impedance is defined and discussed. This impedance shows the effect of the strong locally variable nearfield and indicates that the spheroid generatesL/2R(L/2R= fineness ratio) more acoustic power per unit area at the equator than at the poles. The high‐frequency asymptotic limit of the impedance is determined and from it a radiation criterion of higher modes determined.
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