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A statistical analysis of audience sound absorption (A)

Ramakrishna, BS (1979) A statistical analysis of audience sound absorption (A). In: Journal of the Acoustical Society of America, 65 (Suppl.). S52-S52.

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The absorption produced by the audience in concert halls is considered a random variable. Beranek's proposal [L. L. Beranek, Music, Acoustics and Architecture (Wiley, New York, 1962), p. 543] that audience absorption is proportional to the area they occupy and not to their number is subjected to a statistical hypothesis test. A two variable linear regression model of the absorption with audience area and residual area as regressor variables is postulated for concert halls without added absorptive materials. Since Beranek's contention amounts to the statement that audience absorption is independent of the seating density, the test of the hypothesis lies in categorizing halls by seating density and examining for significant differences among slopes of regression planes of the different categories. Such a test shows that Beranek's hypothesis can be accepted. It is also shown that the audience area is a better predictor of the absorption than the audience number. The absorption coefficients and their 95% confidence limits are given for the audience and residual areas. A critique of the regression model is presented.

Item Type: Editorials/Short Communications
Publication: Journal of the Acoustical Society of America
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 27 Dec 2010 11:47
Last Modified: 27 Dec 2010 11:47
URI: http://eprints.iisc.ac.in/id/eprint/34077

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