A two‐hydrophone method of eliminating the effects of nonacoustic noise interference in measurements of infrasonic ambient noise levels
作者:
Beaumont M. Buck,
Charles R. Greene,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1980)
卷期:
Volume 68,
issue 5
页码: 1306-1308
ISSN:0001-4966
年代: 1980
DOI:10.1121/1.385097
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Water flow around hydrophones and their cables can induce turbulence, flutter, and bounce noises that interfere with measurements of ambient noise at frequencies of 10 Hz or less. Assuming these noises to be uncorrelated at independently suspended hydrophones and with the ocean ambient noise of interest, it is possible to remove their influence from the result of the ambient noise measurement. Two hydrophones can be suspended independently but closely compared to the wavelength of interest, thereby assuring that the ambient noise is highly correlated. The desired ambient noise level will then be given by the covariance of the two hydrophone signals.
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