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Erschienen in:
2003 | OriginalPaper | Buchkapitel
Acoustic Waves Tunnelling into Whispering Gallery Waves
verfasst von : Ivan V. Andronov
Erschienen in: Mathematical and Numerical Aspects of Wave Propagation WAVES 2003
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Generation and propagation of acoustic interface waves running along curvilinear weakly contrast boundary of two media are stadied by formal highfrequency asymptotic technique. Two types of interface waves are found. Waves of one type resemble creeping waves, on the convex side of the boundary and have ray representation on the concave side. These waves are well excited, but travel with significant attenuation. Waves of the other type have the asymptotics similar to whispering gallery waves on the concave side and are exponentially small on the convex side. Excitation of these waves is small, but they run along the interface almost without attenuation.