A study of the spectrum of an acoustic field in shallow water due to noise sources at the surface

Naidu, PS and Mohan, Krishna PG (1989) A study of the spectrum of an acoustic field in shallow water due to noise sources at the surface. In: Journal of the Acoustical Society of America, 85 (2). pp. 716-725.

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Abstract

An expression for the spectrum and cross spectrum of an acoustic field measured at two vertically separated sensors in shallow water has been obtained for any correlated noise sources distributed over the surface. Numerical results are presented for the case where the noise sources, white noise and wind-induced colored noise, are contained within a circular disk centered over the sensors. The acoustic field is generally inhomogeneous except when the channel is deep. The coherence function becomes real for a large disk, for a radius greater than 25 times the depth of the channel, decreases with further increase of the size of the disk, and finally tapers off after certain limiting size, approximately given by 1/alpha, where alpha is the attenuation coefficient.

Item Type:	Journal Article
Publication:	Journal of the Acoustical Society of America
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Keywords:	Noise;Sound Fields;Depth;Wind;Seas.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	13 Oct 2010 08:47
Last Modified:	13 Oct 2010 08:47
URI:	http://eprints.iisc.ac.in/id/eprint/33156

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