Abstract
Frequency dependence of acoustic wave scattering by an infinite cylindrical shell of arbitrary cross section is analyzed using the T-matrix approach. Explicit expression for the T matrix of a two-layered cylinder is presented. Numerical results are obtained for plane wave incidence normal to the axis of the shell but arbitrary with respect to the noncircular cross section for a range of frequencies. Backscattering cross sections for various angles of incidence are presented for aluminum, steel, and plastic compliant tubes. The results obtained for circular and elliptical cross sections are compared with other available theoretical and experimental results.
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