Frequency dependence and intensity fluctuations due to shallow water internal waves
Citable URI
https://hdl.handle.net/1912/2478As published
https://doi.org/10.1121/1.2722052DOI
10.1121/1.2722052Abstract
A theory and experimental results for sound propagation through an anisotropic shallow water environment are presented to examine the frequency dependence of the scintillation index in the presence of internal waves. The theory of horizontal rays and vertical modes is used to establish the azimutal and frequency behavior of the sound intensity fluctuations, specifically for shallow water broadband acoustic signals propagating through internal waves. This theory is then used to examine the frequency dependent, anisotropic acoustic field measured during the SWARM'95 experiment. The frequency dependent modal scintillation index is described for the frequency range of 30–200 Hz on the New Jersey continental shelf.
Description
Author Posting. © Acoustical Society of America, 2007. 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 122 (2007): 747-760, doi:10.1121/1.2722052.
Collections
Suggested Citation
Journal of the Acoustical Society of America 122 (2007): 747-760Related items
Showing items related by title, author, creator and subject.
-
Statistics of normal mode amplitudes in an ocean with random sound-speed perturbations : cross-mode coherence and mean intensity
(Acoustical Society of America, 2009-09)In this paper Creamer's [(1996). J. Acoust. Soc. Am. 99, 2825–2838] transport equation for the mode amplitude coherence matrix resulting from coupled mode propagation through random fields of internal waves is examined in ... -
Fluctuation of 400-Hz sound intensity in the 2001 ASIAEX South China Sea experiment
(IEEE, 2004-10)We present analyses of fluctuations seen in acoustic signals transmitted by two 400-Hz sources moored as part of the ASIAEX 2001 South China Sea (SCS) experiment. One source was near the bottom in 350-m deep water 31.3 km ... -
Measurement and modeling of three-dimensional sound intensity variations due to shallow-water internal waves
(Acoustical Society of America, 2005-02)Broadband acoustic data (30–160 Hz) from the SWARM'95 experiment are analyzed to investigate acoustic signal variability in the presence of ocean internal waves. Temporal variations in the intensity of the received signals ...
