文档介绍：'~~SIGG RAPH'89, Boston,31 July-4August, 1989
simplify the problem. Wallace Sabine [17], considered the Unfortunately, within the space limitations of this paper, it is
pioneer of modern acoustics, used ray theory around the turn of not possible to provide the details of this simulation
the 20th century in the formulation of his well known equation procedure. This material is currently being submitted for
for the calculation of room reverberation time. In the late publication. The interested reader is referred to Stettner's thesis
1950's, Allred and Newhouse [l] first applied Monte Carlo [20] and to the general acoustic's literature [5] and [12].
Methods to calculate the mean-free paths of spaces by tracing
rays on puter. About a decade later, Krokstad, Strcm and Characterization of Sound
Sorsdal [13] made the first attempt to use puter to trace Reverberation Time
rays based on a simple geometric model to get an idea of the For a long time, reverberation time and other early sound
acoustical response of a hypothetical room. This was followed energy decay measurements were considered the primary
by Schroeder's digital simulation of simple reverberant spaces objective parameters in the acoustical design of sound spaces.
[19]. Haviland and Thanedar then extended earlier work with Trying to characterize a hall's sound by using simple
Monte Carlo methods in an attempt to obtain time histories of criteria, however, can be problematic. Recently, the
the pressure at a given point in a field [81. Wayman and Vanyo inadequacy of using the reverberation quantity alone to predict
used these and similar techniques applied to plex the acoustics of a space has e widely realized [4] [10]. In
environments [22]. Walsh [21] conducted similar research in response, a wide variety of relatively new acoustical
the development of the Godot System. measurements have been introduced. Three types of acoustical
Others have attempted to use another metho