Characterization of non-exponential sound energy decays in multiple coupled volumes

Ning Xiang, Philip Robinson, Yun Jing

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recent studies on acoustically coupled volumes, worship spaces, and in concert hall acoustics, have prompted an increasing interest in analyzing sound energy decays consisting of more than one decay slope, so-called nonexponential decays. It has been considered very challenging to estimate parameters associated with double-slope decay characteristics, even more challenging when the coupled-volume systems contain more than two decay processes. To meet the need of characterizing energy decays of multiple decay processes, this paper reports investigations using both acoustical scale-models and numerical models of three coupled volumes. Characterization is based on Bayesian probabilistic inference. Acoustic scale models, and diffusion-equation based models are used to evaluate the estimation strategy, and to validate the results. The analysis method is then applied to geometric-acoustics models of concert halls with more complex geometries. The analysis method within Bayesian framework is capable of determining more than two decay slopes and estimating the corresponding decay parameters.

Original languageEnglish (US)
Title of host publication20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
Pages2585-2588
Number of pages4
StatePublished - Dec 1 2010
Event20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW, Australia
Duration: Aug 23 2010Aug 27 2010

Publication series

Name20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
Volume4

Other

Other20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
CountryAustralia
CitySydney, NSW
Period8/23/108/27/10

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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    Xiang, N., Robinson, P., & Jing, Y. (2010). Characterization of non-exponential sound energy decays in multiple coupled volumes. In 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society (pp. 2585-2588). (20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society; Vol. 4).