Intensity fluctuations of midfrequency sound signals passing through moving nonlinear internal waves
Katsnelson, Boris G.
Grigorev, Valery A.
Lynch, James F.
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The fluctuations of intensity of broadband pulses in the midfrequency range (2–4.5kHz) propagating in shallow water in the presence of intense internal waves moving approximately along the acoustic track are considered. These pulses were received by two separate single hydrophones placed at different distances from the source (∼4 and ∼12km) and in different directions. It is shown that the frequency spectra of the fluctuations for these hydrophones have different predominating frequencies corresponding with the directions of the acoustic track. Comparisons of experimental results with theoretical estimates demonstrate good consistency.
Author Posting. © Acoustical Society of America, 2008. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 124 (2008): EL78-EL84, doi:10.1121/1.2968294.