B005 HIGH-RESOLUTION ECHO-SOUNDING AND ESTIMATION OF SEDIMENT PROPERTIES USING NONLINEAR ACOUSTICS Abstract 1 There are a lot of advantages using nonlinear echo sounders compared to linear ones in particular in shallow water areas. An important problem in sediment acoustics is to determine the thickness of sediment layers. If the sound velocity is known the thickness can be calculated from the travel times. Nonlinear acoustics combined with principles of refraction seismic allow to estimate the sound velocity of selected sediment layers. Nonlinear acoustics has also advantages while obtaining frequency dependent sediment properties like attenuation coefficients. Nonlinear Acoustics JENS WUNDERLICH and GERT


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