On the accuracy of models for predicting sound propagation in fitted rooms

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Journal titleJournal of the Acoustical Society of America
Pages871878; # of pages: 8
Subjectsound propagation; factories; classrooms; offices ( rooms); models; Classroom acoustics
AbstractThe objective of this article is to make a contribution to the evaluation of the accuracy and applicability of models for predicting the sound propagation in fitted rooms such as factories, classrooms, and offices. The models studied are 1:50 scale models; the method-of-image models of Jovicic, Lindqvist, Hodgson, Kurze, and of Lemire and Nicolas; the empirical formula of Friberg; and Ondet and Barbry's ray- tracing model. Sound propagation predictions by the analytic models are compared with the results of sound propagation measurements in a 1:50 scale model and in a warehouse, both containing various densities of approximately isotropically distributed, rectangular- parallelepipedic fittings. The results indicate that the models of Friberg and of Lemire and Nicolas are fundamentally incorrect. While more generally applicable versions exist, the versions of the models of Jovicic and Kurze studied here are found to be of limited applicability since they ignore vertical-wall reflections. The Hodgson and Lindqvist models appear to be accurate in certain limited cases. This preliminary study found the ray-tracing model of Ondet and Barbry to be the most accurate of all the cases studied. Furthermore, it has the necessary flexibility with respect to room geometry, surface- absorption distribution, and fitting distribution. It appears to be the model with the greatest applicability to fitted-room sound propagation prediction
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number32356
NPARC number20375002
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Record identifierda7c99e9-96c2-499b-bf99-666b0e8ce97a
Record created2012-07-23
Record modified2016-05-09
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