Experimental investigation of chair type, row spacing, occupants, and carpet on theatre chair absorption

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DOIResolve DOI: http://doi.org/10.1121/1.4904532
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TypeArticle
Journal titleThe Journal of the Acoustical Society of America
ISSN0001-4966
Volume137
Issue1
Pages105116
AbstractThis paper examines how the individual variations of chair type, row spacing, as well as the presence of occupants and carpet, combine to influence the absorption characteristics of theater chairs as a function of sample perimeter-to-area (P/A) ratios. Scale models were used to measure the interactive effects of the four test variables on the chair absorption characteristics, avoiding the practical difficulties of full scale measurements. All of the test variables led to effects that could lead to important changes to auditorium acoustics conditions. At mid and higher frequencies, the various effects can usually be explained as due to, more or less, porous absorbing material. In the 125 and 250 Hz octave bands, the major changes were attributed to resonant absorbing mechanisms. The results indicate that for accurate predictions of the effective absorption of the chairs in an auditorium, one should use the P/A method and reverberation chamber tests of the chair absorption coefficients to predict the absorption coefficients of each block of chairs and use these results as input in a room acoustics computer model of the auditorium. The application of these results to auditorium acoustics design is described, more approximate approaches are considered, and relations to existing methods are discussed.
Publication date
PublisherAcoustical Society of America
LanguageEnglish
AffiliationConstruction; National Research Council Canada
Peer reviewedYes
NPARC number23001011
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Record identifier44efa999-5049-47ab-8c0c-fd440afaa5bd
Record created2016-11-29
Record modified2017-04-05
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