Treatment of early and late reflections in a hybrid computer model for room acoustics

Graham Naylor

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Abstract

The ODEON computer model for acoustics in large rooms is intended for use both in design (by predicting room acoustical indices quickly and easily) and in research (by forming the basis of an auralization system and allowing study of various room acoustical phenomena). These conflicting demands preclude the use of both ``pure'' image source and ``pure'' particle tracing methods. A hybrid model has been developed, in which rays discover potential image sources up to a specified order. Thereafter, the same ray tracing process is used in a different way to rapidly generate a dense reverberant decay. In this paper the computational model is described. Particular attention is paid to alternative methods of implementing the reverberant tail, and to the problems that arise when joining early and late parts of a reflectogram generated with different algorithms. A companion paper presents the features of the model as implemented.
Original languageEnglish
JournalAcoustical Society of America. Journal
Volume92
Issue number4
Pages (from-to)2345-2345
ISSN0001-4966
DOIs
Publication statusPublished - 1992

Bibliographical note

Copyright (1992) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

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