The Monte Carlo method to determine the error in calculation of objective acoustic parameters within the ray-tracing technique

This article is an extension of the procedure to estimate errors in ray-tracing calculations of room response proposed by Giner et al. [J. Acoust. Soc. Am. 106, 816-823 (1999)]. The previous article presented an expression to estimate the error in computing the energy reaching a receptor during a small time interval. This expression was obtained assuming that a pure ray-tracing program is used and a Monte Carlo Technique is applied. In the present work these ideas are extended in order to compute the objective acoustic parameters of a room. The corresponding equations are presented in closed form. Our results show that the number of rays involved in the analysis depends on the nature of the parameters to be evaluated. Some examples are shown in order to validate our conclusions. (C) 2001 Acoustical Society of America.