Acoustical Radiosity Model for Sound Decays in Coupled Spaces

Abstract:

An improved model based on acoustical radiosity was proposed to investigate sound decays in a system of two coupled spaces.The coupling aperture was assumed to be two virtual surfaces and the acoustical radiosity on these surfaces was employed to implement sound energy exchange between two subspaces.Therefore,the computation of acoustical radiosity can be individually conducted in each subspace,and the computational expense is reduced significantly.Moreover,the improved model avoids errors due to visibility checking for elements on different subspace boundaries.Comparisons with field measurements show that the improved acoustical radiosity model can predict sound decays accurately in coupled spaces and has satisfactory convergence.