Abstract
This article forms a complement to a theoretical investigation into the problem of sound transmission through a single plate with absorptive layers attached on source and/or receiver side, previously published [D. Takahashi, J. Acoust. Soc. Am. 83, 1453–1457 (1988)]. The theory is improved on several points regarding both the absorptive layer and acoustic coupling at the radiation boundary. An expression with a simple form for predicting the transmission loss, having consistency with the well-known transmission theory of single plates, is obtained. Also, the principle of reciprocity holds in the improved theory. The accuracy of the theoretical prediction is discussed by comparison with experimental data measured by using the reverberation-room method. The results are in good agreement in the trend of the effect of absorptive layer on the transmission loss.
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