Surface diffusion coefficients for room acoustics : free-field measures

Hargreaves, TJ; Cox, TJ; Lam, YW; D'Antonio, P

Abstract

A surface diffusion coefficient is needed in room acoustics to enable the quality of diffusing surfaces to be evaluated. It may also facilitate more accurate geometric room acoustic models. This paper concentrates on diffusion coefficients derived from free-field polar responses. An extensive set of two- and three-dimensional measurements and predictions was used to test the worth of different diffusion coefficient definitions. The merits and problems associated with these types of coefficients are discussed, and past parameters reviewed. Two new coefficients are described. The new measure based on the autocorrelation function is forwarded as the best free-field coefficient. The strengths and weaknesses of the coefficient are defined. © 2000 Acoustical Society of America.

Citation

Hargreaves, T., Cox, T., Lam, Y., & D'Antonio, P. (2000). Surface diffusion coefficients for room acoustics : free-field measures. https://doi.org/10.1121/1.1310192

• Journal Article Type: Article
• Publication Date: Jan 1, 2000
• Deposit Date: Apr 19, 2011
• Publicly Available Date: Apr 5, 2016
• Journal: The Journal of the Acoustical Society of America (JASA)
• Publisher: Acoustical Society of America
• Peer Reviewed: Peer Reviewed
• Volume: 108
• Issue: 4
• Pages: 1710-1720
• DOI: https://doi.org/10.1121/1.1310192
• Publisher URL: http://dx.doi.org/10.1121/1.1310192
• Related Public URLs: http://asadl.org/jasa/resource/1/jasman/v108/i4/p1710_s1
• Additional Information: Funders : Engineering and Physical Sciences Research Council (EPSRC)