COMSOL Verification and Validation Models

This is a model of acoustic absorption by a porous acoustic open cell foam. In porous materials the sound propagates in a network of small interconnected pores. Because the dimensions of the pores are small, losses occur due to thermal conduction and viscous friction. Acoustic foams are used to sound proof rooms and ducts as well as to treat reverberation problems in rooms.

The aim of the model is to characterize the absorption properties—more specifically, the specific surface impedance and the absorption coefficient—of a layer of melamine foam in terms of sound incidence angle and frequency. The model uses a 2D geometry of such a system.