Title :
Experimental study of wave propagation models for sediments by calibrated transmission experiments on laboratory scale
Author :
Vandenplas, S. ; Abdellatif, B.T. ; Peirlinckx, L. ; Van Biesen, L.
Author_Institution :
Dept. ELEC, Vrije Univ., Brussels, Belgium
fDate :
28 Sep-1 Oct 1998
Abstract :
Due to the complexity of the seafloor as an acoustical system and the huge degree of difficulty in getting accurate and proper backscattered seafloor data, it is highly advisable to first study and validate acoustic wave propagation models using sediments in laboratory circumstances. A Plexiglass-sediment-Plexiglass configuration is used to carry out a transmission experiment on fine sand. The mechanical properties of the sediment are modelled by a general viscoelastic model. An inverse procedure based on a maximum likelihood estimator is used to estimate the physical parameters of the sediment. In order to validate the model, a cross-examination by a reflection experiment is elaborated
Keywords :
plastics; sediments; underwater acoustic propagation; 500 kHz; Plexiglass; acoustic wave propagation models; acoustical system; backscattered seafloor data; experimental study; fine sand; general viscoelastic model; laboratory transmission experiments; maximum likelihood estimator; mechanical properties; physical parameters; reflection experiment; sediments; transmission experiment; Acoustic propagation; Acoustic waves; Elasticity; Laboratories; Maximum likelihood estimation; Mechanical factors; Parameter estimation; Sea floor; Sediments; Viscosity;
Conference_Titel :
OCEANS '98 Conference Proceedings
Conference_Location :
Nice
Print_ISBN :
0-7803-5045-6
DOI :
10.1109/OCEANS.1998.725772
