2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/110402The scattering determinant for the scattering of waves from several obstacles is considered in the case of elastic solids with voids. The multi-scattering determinant displays contributions from periodic ray-splitting orbits. A discussion of the weights of such orbits is presented.MMWP05 conference proceeding. 10 pages, 3 figuresChaotic DynamicsMaterials ScienceMathematical Physicstext