A modified diffusion equation for room-acoustic predication

This letter presents a modified diffusion model using an Eyring absorption coefficient to predict the reverberation time and sound pressure distributions in enclosures. While the original diffusion model [Ollendorff, Acustica 21, 236–245 (1969); J. Picaut et al. , Acustica 83, 614–621 (1997); Valeau...

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Bibliographic Details
Published in:	The Journal of the Acoustical Society of America 2007-06, Vol.121 (6), p.3284-3287
Main Authors:	Jing, Yun, Xiang, Ning
Format:	Article
Language:	eng
Subjects:	Acoustics Architectural acoustics Diffusion Exact sciences and technology Fundamental areas of phenomenology (including applications) Models, Biological Models, Theoretical Physics Sound
Online Access:	Get full text
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Summary:	This letter presents a modified diffusion model using an Eyring absorption coefficient to predict the reverberation time and sound pressure distributions in enclosures. While the original diffusion model [Ollendorff, Acustica 21, 236–245 (1969); J. Picaut et al. , Acustica 83, 614–621 (1997); Valeau et al. , J. Acoust. Soc. Am. 119, 1504–1513 (2006)] usually has good performance for low absorption, the modified diffusion model yields more satisfactory results for both low and high absorption. Comparisons among the modified model, the original model, a geometrical-acoustics model, and several well-established theories in terms of reverberation times and sound pressure level distributions, indicate significantly improved prediction accuracy by the modification.
ISSN:	0001-4966 1520-8524