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The reflectivity of incident longitudinal and transversal waves at the interface between two solid half-spaces is studied for different degrees of bonding. Numerical calculations based on Murty’s assumptions [G. S. Murty, Geophys. J. R. Astron. Soc. 44, 388 (1976)] are compared with experimental measurements. The agreement between theory and experiments is reasonably good for RHHTT and RLL coefficients. The plots obtained for RVVTT reveal the existence of an interface wave, the theoretical angular position of which coincides with the critical angle calculated by assuming that this interface wave is a type of Rayleigh wave or interface wave, depending on the acoustical parameters.

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