On the numerical modelling of reverberation rooms, including a comparison with experiments

At low frequencies the acoustic field in a reverberation room is not diffuse, and it should therefore be modeled by means of a deterministic approach. In this work, a finite element model was developed to include the modal behavior of the room. Dissipation in the empty reverberation room is taken into account by means of a volumetric approach, using an explicit closed-form expression for the complex speed of sound, on the basis of standard reverberation time measurements. Comparisons with measurements in a reverberation room show that the transfer functions and impulse response functions can be predicted fairly well