Scattering analysis of a partitioned wave-bearing cavity containing different material properties

Abstract

The scattering analysis of acoustic waves through a wave-bearing cavity containing parallel partitioning is presented. The modeled physical configuration comprises an elastic membrane-bounded expansion chamber separated by horizontal plates. The bounding wall conditions of the splitting plates can be chosen to acoustically rigid, soft or an absorbent lining. The governing boundary value problem is solved by using Mode-Matching technique. The low frequency approximation is used and validated in a low frequency regime via the Mode-Matching solution. It is seen that scattering energies and the transmission loss is significantly affected by the variations of material properties of isotropic membranes and the bounding wall conditions. The considered configuration can be opted for the reactive as well as passive control measure of sound.