Time-Frequency Features of 3-D Sound Propagation in Wedge-Shaped Oceanic Waveguides - Archive ouverte HAL Access content directly
Journal Articles IEEE Journal of Oceanic Engineering Year : 2015

Time-Frequency Features of 3-D Sound Propagation in Wedge-Shaped Oceanic Waveguides

Abstract

This paper considers propagation of low-frequency broadband pulses in shallow water. It focuses on across-slope propagation in wedge-shaped oceanic waveguides and on single hydrophone receiving configurations. In a low-frequency shallow-water context, propagation is dispersive and usually described by modal theory. However, in the presence of a tilted bottom, propagation is also affected by 3-D effects (horizontal refractions). The paper shows that time-frequency analysis is a suitable tool to illustrate and understand 3-D propagation. It illustrates the pertinence of the time-frequency analysis of 3-D signal by proposing an algorithm to estimate the seabed slope using a single receiver. The method is benchmarked on numerical simulations, and successfully applied on small-scale experimental data.
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hal-01255420 , version 1 (13-01-2016)

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Frederic Sturm, Julien Bonnel. Time-Frequency Features of 3-D Sound Propagation in Wedge-Shaped Oceanic Waveguides. IEEE Journal of Oceanic Engineering, 2015, 41 (3), pp.731 - 739. ⟨10.1109/JOE.2015.2461711⟩. ⟨hal-01255420⟩
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