1 - General Introduction2 - Homogénéisation électrostatique3 - Homogénéisation acoustique4 - Dispersion and dissipation5 - Acoustic identification of a rough interface between two fluid-filled half spaces6 - The intersecting canonical body approximation (ICBA) for the description of scattering of a plane wave by the rough interface between two fluid media7 - Boundary integral formulation employing the free-space Green's function for the description of scattering of a plane wave by an acoustically-soft rough boundary of infinite extent8 - Identification of the rough acoustically-soft boundary of a half-space probed by a plane wave9 - Identification of an acoustically-soft rough boundary of infinite extent by low-frequency probe radiation