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Evaluation of decay times in coupled spaces: Bayesian parameter estimation



Evaluation of decay times in coupled spaces: Bayesian parameter estimation



Journal of the Acoustical Society of America 110(3 Pt 1): 1415-1424



Determination of sound decay times in coupled spaces often demands considerable effort. Based on Schroeder's backward integration of room impulse responses, it is often difficult to distinguish different portions of multirate sound energy decay functions. A model-based parameter estimation method, using Bayesian probabilistic inference, proves to be a powerful tool for evaluating decay times. A decay model due to one of the authors [N. Xiang, J. Acoust. Soc. Am. 98, 2112-2121 (1995)] is extended to multirate decay functions. Following a summary of Bayesian model-based parameter estimation, the present paper discusses estimates in terms of both synthesized and measured decay functions. No careful estimation of initial values is required, in contrast to gradient-based approaches. The resulting robust algorithmic estimation of more than one decay time, from experimentally measured decay functions, is clearly superior to the existing nonlinear regression approach.

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Accession: 046009053

Download citation: RISBibTeXText

PMID: 11572352

DOI: 10.1121/1.1390334


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