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Scattering from fluid‐loaded elastic targets near penetrable sediments

A T‐matrix formalism developed for plane‐wave scattering from a fluid‐loaded elastic spherical shell near a rough fluid elastic interface [J. Acoust. Soc. Am. 101, 767–788 (1997)] is generalized to include scattering from targets for which a T‐matrix is known and constructed on a spherical wave basis, and from the interface of penetrable sediments for which a T‐matrix is known and constructed on a Weyl plane‐wave basis. A variety of numerical results are obtained for plane‐wave scattering from elastic spheres and elastic spherical shells, as well as a finite elastic cylinder with hemispherical end caps near rigid, soft, fluid, elastic, poroelastic, and layered fluid sediments with planar boundaries that demonstrate some of the effects’ target‐boundary scattering on resonant and nonresonant scattering.