ON THE THEORY OF LEAKY WAVES IN CRYSTALS

The problem of finding the velocity of the leaky wave given rise to by the Rayleigh wave on the mechanically free surface of anisotropic med ia is investigated. Approximate expressions for the real and imaginary parts of the velocity of the leaky wave are derived without any assum ptions about the symmetry of the crystal. Employing obtained formulae allows one to avoid complicated numerical computations for most of the practically interesting situations. Specific features of the resonanc e reflection of elastic waves in the vicinity of the leaky wave branch are briefly discussed.