Abstract
A plane sound wave is incident upon an anisotropic rectangular plate set in an otherwise rigid baffle surrounded by a light compressible fluid. In the limit of small wavelengths, compared with plate dimensions, the transmitted sound power is estimated, averaged over a small frequency band and over all possible angles of incidence. Explicit results are presented for a special type of anisotropy, and they have different forms according as the operating frequency ω is above coincidence, below coincidence or with in a range of frequencies (ω 2 < ω < ω 1 ) that corresponds to coincidence. Transition formulae are given for frequencies near the boundaries of the three régimes. The results are extended to allow for more general plate equations.
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Schedule a callMore From: Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
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