Cross‐spectral method of measuring acoustic intensity without error caused by instrument phase mismatch
作者:
J. Y. Chung,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1978)
卷期:
Volume 64,
issue 6
页码: 1613-1616
ISSN:0001-4966
年代: 1978
DOI:10.1121/1.382145
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The theory of a new method of measuring acoustic intensity is presented. The method uses measurements of the cross spectrum of the pressures at two closely spaced microphones. To eliminate the measurement error due to instrument phase mismatch, a circuit switching procedure is used. The method is applicable to any acoustic field subject to the condition that the product of the wave number and the microphone spacing remains small. The method has been verified by laboratory experiment.
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