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- W1970557653 abstract "The kinetic theory of wave propagation in random media is applied to assess the relative merits of the peripherally segmented, axially segmented and “checkerboard” configured acoustic duct treatments proposed by Mani [1]. It is argued that, in a first approximation, a multisegmented liner involving many discrete and distinct sections may be modelled as a liner whose impedance varies randomly with position. This results in a relatively simple analytical description of the acoustic properties of the liner in terms of a system with axial distance of the acoustic modal intensities. The theory is expected to be valid provided that the variation in the impedance from segment to segment is small, so that the conclusions obtained here are of a preliminary nature, and must be regarded as giving a general indication of features which should be incorporated into the design of efficient acoustic liners. The principal such conclusion is that a checkerboard liner offers the best means of increasing the attenuation over and above that of a uniformly lined duct. On the other hand, only minimal gains are to be derived from the use of strictly peripherally segmented liners." @default.
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- W1970557653 date "1983-03-01" @default.
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- W1970557653 title "The attenuation of sound in a randomly lined duct" @default.
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- W1970557653 doi "https://doi.org/10.1016/0022-460x(83)90441-8" @default.
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