The application of advanced computer models to the prediction of sound in enclosed spaces

Howarth, MJ

Abstract

Computer modelling of acoustics in enclosures has developed into various forms, none
of which have yet demonstrated 100% accuracy. This thesis therefore details a study of
room acoustic computer modelling. It highlights weaknesses with existing modelling
techniques and describes the development and subsequent verification of an improved
modelling technique.
The study discovers that for accurate prediction of many common room acoustic
parameters diffuse reflections should be accounted for in the modelling of all reflection
orders. However, many of the problems encountered in existing techniques are found to
be caused by the way these diffuse reflections are modelled.
An improved modelling technique, referred to as a 'Hybrid-Markov' method, is
proposed and developed that combines a conventional hybrid method with a radiantexchange
process to model diffuse reflections. Initial verification of the new modelling
technique results in similar overall accuracies to existing modelling techniques but solves
many of the specific problems discovered. It therefore provides a flexible and robust
framework for the future development of computer prediction of sound in enclosed
spaces.

Citation

Howarth, M. The application of advanced computer models to the prediction of sound in enclosed spaces. (Thesis). University of Salford

• Thesis Type: Thesis
• Deposit Date: Sep 26, 2011
• Publicly Available Date: Sep 26, 2011
• Award Date: Jan 1, 1998