T. R. Januarsari
Dept. of Appl. Acoust., Salford Univ., Salford M5 4WT, England
The lack of diffuse reflection in a room acoustic computer model ODEON 1.1
[created by Tech. Univ. of Denmark] is considered as one major technical
shortcoming. This can lead to very poor estimation of the reverberation
behavior of the room whose geometry is itself poorly diffusive. In order to
overcome this problem, surfaces are considered to be partially specularly and
partially diffusely reflecting, as quantified by absorption coefficient a and
diffusion coefficient d, respectively. The diffuse energy, i.e., a proportion
d(1-a) of the incident energy, is assumed to be distributed uniformly inside
the room and accumulating in an imaginary pool. By using Sabine diffuse energy
decay formulas: E(t)=E(t[sub 0])