3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1145-C5-1148
Nonlinear acoustical properties of suspended sedimentI.N. KOZHEVNIKOVA and L. BJØRNØ
Technical University of Denmark, Department of Industrial Acoustics, Building 425, 2800 Lyngby, Denmark
Maritime advances during recent years have shown the importance of and the need for development of ultrasonic methods for the investigation of the transport of suspended marine sediments in rivers and in coastal regions. Two main acoustical procedures have been developed and used for the investigations of suspended sediment qualities during the laboratory studies, (1) high frequency resonance backscattering and (2) attenuation acoustic spectroscopy. Both approaches are based on the same fundamental concepts, the interaction process between ultrasonic signals and suspended sediment particles. On this background a comprehensive study has been launched by the EC under the MAST Programme aiming at a characterization of suspended matter by acoustic remote sensing technique. The results of the initial theoretical studies of nonlinear properties of the suspended sediments are reported.
© EDP Sciences 1994