Acoustic Transmission with Mode Conversion Phenomenon (original) (raw)

2005

Abstract

If an acoustic wave impinges on an interface between two media with an oblique incidence, and if one of these media is a solid, in general, a complicated phenomenon occurs, that is referred to as mode conversion from longitudinal wave to shear wave, and vice­versa, for the reflected and transmitted waves. The relations between the reflected and transmitted waves and the incident wave, defined in terms of amplitude and intensity, depend on the characteristic acoustic impedances of the media, the angles of incidence and the types of the incident wave (longitudinal or shear wave). The determination of these relations, the reflection and transmission coefficients, can be made by using the transmission­line models for waves in fluids and isotropic solids. In solids, this resolution takes into account the continuity of stresses and the particle velocity at the interface, and can be difficult to solve. This work presents a simple form of the system of equations to calculate the reflection ...

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