By Finn B. Jensen (auth.), José M. F. Moura, Isabel M. G. Lourtie (eds.)

ISBN-10: 9401046999

ISBN-13: 9789401046992

ISBN-10: 9401116040

ISBN-13: 9789401116046

Acoustic sign Processing for Ocean Explortion has significant ambitions: (i) to offer sign processing algorithms that take into consideration the versions of acoustic propagation within the ocean and; (ii) to provide a standpoint of the huge set of recommendations, difficulties, and purposes coming up in ocean exploration.
The publication discusses similar matters and difficulties concentrated in version dependent acoustic sign processing tools. in addition to addressing the matter of the propagation of acoustics within the ocean, it offers appropriate acoustic sign processing tools like matched box processing, array processing, and localization and detection ideas. those extra conventional contexts are herein enlarged to incorporate imaging and mapping, and new sign illustration versions like time/frequency and wavelet transforms. numerous utilized features of those themes, similar to the appliance of acoustics to fisheries, sea ground swath mapping by way of swath bathymetry and aspect experiment sonar, independent underwater cars and communications in underwater also are considered.

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Extra resources for Acoustic Signal Processing for Ocean Exploration

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1992). "Reflection loss at a bottom with a fluid sediment over a hard solid halfspace", J. Acoust. Soc. Am. J. (1980a). "The effect of sediment rigidity on bottom reflection loss in typical deep sea sediments," J. Acoust. Soc. Am. 68, 634-638. J. (1980b). " J. Acoust. Soc. Am. 68, 639-648. F. R. (1990). "Low-frequency acoustic propagation loss in shallow water over hard-rock seabeds covered by a thin layer of elastic-solid sediment," J. Acoust. Soc. Am. 88, 283-297. D. ,(1981). "Reflection of acoustic waves at a water-sediment interface" , J.

That excitation of Stoneley waves at the interface between the layer and the subbottom can produce a high bottom loss was first demonstrated by Hawker [9]. The excitation can also be considered as a kind of tunnelling effect where the evanescent wave in the layer interact with the solid substrate. From Fig. 11 we note that this can will only occur in very special cases where a relative thin sedimentary layer is overlying a very hard rock. Note also that this effect is not dependent on the sediment layer to have any rigidity.

A. Kuperman, Time domain formulation for pulse propagation including nonlinear behavior at a caustic, J. Acoust. Soc. Amer. 81 (1987) 1406-1417. D. A. E. McDonald, Perth-Bermuda sound propagation (1960): Adiabatic mode interpretation, J. Acoust. Soc. Amer. 90 {1991} 2586-2594. MECHANISMS OF BOTTOM LOSS IN UNDERWATER ACOUSTICS JENS M. HOVEM The Norwegian Institute of Technology Division of Telecommunications/Acoustics Trondheim Norway ABSTRACT. Acoustic wave propagation in shallow water is best characterized as mode propagation where the propagating modes correspond to grazing angles at the bottom lower than critical.

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Acoustic Signal Processing for Ocean Exploration by Finn B. Jensen (auth.), José M. F. Moura, Isabel M. G. Lourtie (eds.)

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