Prediction of the acoustics of coupled rooms with the acoustic-diffusion model

摘要

A general model is proposed to simulate the acoustics of coupled rooms. It is based ona diffusion equation, solved numerically to perform acoustic predictions. The presence ofscattering objects –or the “fittings”– is also taken into account. Distinct sub-volumes can bedefined, representing either coupled volumes or zones with different fitting characteristics.Some sample results are presented, and compared with ray-tracing results and experimentaldata. Two situations are assessed: two coupled classrooms, and a room divided into twozones, one empty, one fitted. The diffusion-model predictions match the other datasatisfactorily, both in terms of sound attenuation and sound decay. Diffusion-based resultsare obtained with the advantage of low computational time compared to ray-tracing results.