Abstract
Temporal fluctuations of the sound intensity in shallow water are studied using broadband acoustic signal propagation through an internal soliton (IS) wave front. Time-frequency analysis of the received signals at two different vertical arrays is conducted based on the wavelet transform. The intensity fluctuations as a function of geophysical time are shown for different positions of the IS with respect to the acoustic propagation path. A theoretical model consisting of internal waves coupled with the acoustic normal modes and horizontal rays is presented. The correlation between the signal fluctuations and the internal soliton is analyzed using frequency dependent index of refraction. Model results are compared with the SWARM-95 experimental observation. [Work supported by ONR and RFBR Grant No. 03-05-64568.]
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