Abstract
The theory of sound propagation in rigid cylindrical tubes is established by the separate treatments of viscous and thermal effects [K. Attenborough, J. Acoust. Soc. Am. 73, 785–799 (1983)]. Such development is applied to investigate the theory of sound propagation in rigid rectangular tubes. Arrays of air-filled rigid parallel rectangular tubes are prepared to compare the theory with the measurements of propagation constants. [Roh et al., J. Acoust. Soc. Am. Suppl. 1 85, S82 (1989)]. The theoretical calculation of complex propagation constants is compared with experimental data as a function of frequency. The dynamic shape factor, which is related to deviation of propagation constants in cylindrical tube cross sections, is examined by comparison of propagation theories between rectangular and circular tubes. [Work supported by ONR and USA-CERL.]
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