Reverberation time formulae reconsidered.
J Acoust Soc Am 1972 Aug; 52(2):493-494
The widely used reverberation time formula due to Eyring was derived on the assumption of step-wise drops in the energy level of a diffuse sound field. The argument, besides being difficult to follow, was not justified from the statistical notion of a diffuse field. It is found that Eyring's formula can be extracted from a difference equation based on an energy principle which preserves the continuous nature of the decay process. Interpretations of the average absorption coefficient are also given.
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Journal of the Acoustical Society of America
University of Pittsburgh, Pittsburgh, Pennsylvania