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Chandler-Wilde, S. N. (1995)
Publisher: Acoustical Society of America
Languages: English
Types: Article
Subjects:
Identifiers:doi:10.1121/1.413610
In this paper it is shown that a number of theoretical models of the acoustical properties of rigid frame porous media, especially those involving ratios of Bessel functions of complex argument, can be accurately approximated and greatly simplified by the use of Padé approximation techniques. In the case of the model of Attenborough [J. Acoust. Soc. Am. 81, 93–102 (1987)] rational approximations are produced for the characteristic impedance, propagation constant, dynamic compressibility, and dynamic density, as a function of frequency and the material parameters. The model proposed by Stinson and Champoux
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    • 2. Based on Stinson and Champoux model Po= (q2/I )po-(o./itø)FAX(/-i-ks),
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