3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1071-C5-1074
Etude de la propagation acoustique dans des milieux stratifiés inhomogènes, application à la caractérisation des fonds marinsM.-F. POUJOL-PFEFER
CNRS, Laboratoire de Mécanique et d'Acoustique, 31 Chemin Joseph Aiguier, 13402 Marseille cedex 20, France
With the aim of identifying marine sediments we study the conditions of validity of two homogeneization models giving estimates of the effective velocity in inhomogeneous media. We have considered the Kuster -Toksöz quasi-static model and the Waterman-Truell. dynamic model. Here, we compare the two models experimentally by making measurements on inhomogeneous samples made of glass spheres in gel. We then propose a process for identifying the radius of inclusions and their volume concentration from the measured values of the wave velocity versus frequency, well estimated by the Waterman-Truell model.
© EDP Sciences 1994