Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13702
Title: Prediction of the absorption exponent in rectangular enclosures with a single absorbent boundary
Authors: Han, N
Mak, CM 
Keywords: Absorption exponent
Enclosures with a single absorbent boundary
Issue Date: 2009
Publisher: Pergamon Press
Source: Applied acoustics, 2009, v. 70, no. 2, p. 297-299 How to cite?
Journal: Applied acoustics 
Abstract: It is known that the classical theory of room acoustics cannot be strictly applied to the study of the sound field in a rectangular enclosure with only five boundaries (i.e., with a single absorbent boundary), as the sound field in the enclosure is not diffuse. A theoretical method is developed for the prediction of the absorption exponent in a rectangular enclosure with a single absorbent boundary, and the absorption exponent is used to describe the exponential decay of the sound energy. The method is based on the radiosity-based theoretical/computer model and is used for diffusely reflecting boundaries. The predicted absorption exponent is compared with the Kuttruff values and the simulation results from Monte-Carlo computations. It is found that the predicted absorption exponent of the proposed method shows better agreement with the simulation results from Monte-Carlo computations than the Kuttruff values. With the more accurately predicted absorption exponent, the slope of the energy decay curve and other acoustic parameters in an enclosure with a single absorbent boundary can be obtained accurately.
URI: http://hdl.handle.net/10397/13702
ISSN: 0003-682X
EISSN: 1872-910X
DOI: 10.1016/j.apacoust.2008.04.001
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