Comparison of radiosity and ray-tracing methods for coupled rooms

Jimmy Dondaine , Alain Le Bot (1) , Joel Rech (1) , Sébastien Mussa Peretto

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

In the field of geometrical acoustics, the radiosity method is based on an analogy with the so-called view factor method in thermics. The method has been successfully applied to the prediction of reverberation time as well as the calculation of sound pressure level maps in single room. It has been shown to be equivalent to the ray-tracing technique with diffuse reflection on walls. In this study, the radiosity method is applied to coupled rooms. Transmission and reflection of sound on the separating wall are taken into account by means of Snell's law. Numerical results with the software CeRes are presented and compared with standard ray-tracing. The method is found to be useful for designing enclosures of noise sources.

Mots clés: radiosity; ray-tracing; coupled rooms

Domaines: Acoustique [physics.class-ph]

Jimmy Dondaine, Alain Le Bot, Joel Rech, Sébastien Mussa Peretto. Comparison of radiosity and ray-tracing methods for coupled rooms. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811108⟩