Optical holography for the study of sound radiation from vibrating surfaces
作者:
Colin H. Hansen,
David Alan Bies,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1976)
卷期:
Volume 60,
issue 3
页码: 543-555
ISSN:0001-4966
年代: 1976
DOI:10.1121/1.381128
出版商: Acoustical Society of America
关键词: 2055;4024;3565
数据来源: AIP
摘要:
Time‐averaged holography has been used to quantitatively investigate sound radiation from an edge‐clamped circular flat plate mounted in an infinite rigid baffle. For a particular mode of vibration, the plate response is measured using holography and the sound power radiated is measured in a reverberant room with the plate mounted in one of the room walls. From these measurements a radiation efficiency is determined. The theoretical plate responce is calculated using both classical and Mindlin–Timoshneko plate theory and is shown to agree well with experimental measurements. Radiated sound power is calculated for each mode of interest by solving the wave equation in oblate spheroidal coordinates at the plate surface. These calculations are verified by direct evaluation of the Rayleigh integral in the farfield. Good agreement is obtained between experimentally measured radiation efficiencies and theoretical predictions. Small discrepancies between theory and experiment are discussed.Subject Classification: [43]20.55, [43]40.24, [43]35.65.
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