Development of a MATLAB code based on a weak formulation of wave propagation through a porous material: comparison with experimental results Available to Purchase

In the present paper a weighted residual formulation of wave propagation through a porous material for a three‐dimensional case, based on the theoretical formulation of Zwikker and Kosten for sound propagation in porous material, is described. Based on this formulation, a MATLAB code was developed which simulates an experimental configuration that consists of: a double wall cavity, formed by two parallel aluminum panels; and a reverberation room. A loudspeaker is placed on the reverberation room to provide the acoustical excitation of the double wall set‐up. The results which are obtained from the MATLAB code, in terms of the sound pressure level (SPL) in the double wall cavity and the displacement of the two panels, are compared with the corresponding experimental ones for the cases of air and thermal insulation material being the medium filling the double wall cavity.