A mean for measuring the surface sound energy diffusion coefficient in a room

The partly specular reflection and partly diffusion reflection model is a convenient way to express the phenomena of surface sound energy scattering in room acoustics.Sound energy diffusion coefficient becomes a key factor to study surface scattering.But there have been very few means for determining the average sound energy diffusion coefficient.Vorlander proposed such an easy one based on the interrelating principle.However,his mean ignored the interrelation from direct sound,in which defect is present.This paper suggests a new approximate mean for calculating sound energy diffusion coefficient,including direct sound and first strong reflections.Therefore,Vorlander's defect is overcome.In addition,with the aid of digital measuring technology,a relevant measuring system was developed.The experiment result shows that the mean in this paper is improved much than Vorlander's.