Teemu Lukkari, Jarmo Malinen
Published 2012-04-18, updated 2013-06-28Version 3
Wave propagation in curved tubular domains is considered. A general version of Webster's equation is derived from the scattering passive wave equation. More precisely, it is shown that planar averages of a sufficiently smooth solution of the wave equation satisfy the corresponding Webster's equation when the latter includes additional control signals determined by the solution.
Comments: 27pp., 3pp. appendix, 3 figures
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