Etude de la propagation acoustique dans des milieux stratifiés inhomogènes, application à la caractérisation des fonds marins

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