Sound scattering by clusters of rigid cylinders in air

Abstract

The scattering of sound by a cluster of rigid cylinders in air has been investigated both theoretically and experimentally. The cluster was made by a lattice of cylinders with hexagonal symmetry. The sound scattered in all directions around the cluster is measured and compared with a calculation based on multiple scattering theory. The behavior as a function of the external geometry of the cluster will also be presented. The refraction and reflection of the sound by the boundaries of the cluster is analyzed by a theoretical model that takes into account its inner crystal symmetry. [Work supported by MEC of Spain.]