Reverberation measurements, made in rooms where the absorption is nonuniformly distributed, usually vary widely from predictions based on the currently employed formulas. Through extensive tests made in a large number of rooms, where distribution of sound absorption varies widely in uniformity, an empirically derived equation is submitted. Photographs of graphic recorder decay curves, showing contrasts in predicted slopes, seem to confirm the validity of the formula. The recorder curves are from field tests. The data submitted are a small portion of an accumulation of measurements, covering several years, in rooms of widely varying volumes, widely varying boundary ratios, and marked dissimilarity in amounts of absorption and ratios of absorption distribution.
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July 1959
July 01 1959
Reverberation Formula Which Seems to Be More Accurate with Nonuniform Distribution of Absorption
Dariel Fitzroy
Dariel Fitzroy
P. O. Box 482, San Rafael, California
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J. Acoust. Soc. Am. 31, 893–897 (1959)
Article history
Received:
March 03 1959
Citation
Dariel Fitzroy; Reverberation Formula Which Seems to Be More Accurate with Nonuniform Distribution of Absorption. J. Acoust. Soc. Am. 1 July 1959; 31 (7): 893–897. https://doi.org/10.1121/1.1907814
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