Second-harmonic generation in sound beams reflected from, and transmitted through, immersed elastic solids

Second-harmonic generation in sound beams reflected from and transmitted th rough thick isotropic elastic solids is investigated experimentally. Measur ements of diffraction patterns are compared with a theoretical model based on integral solutions for harmonic generation in sound helms. The solutions are connected by classical linear theory for reflection and transmission a t fluid-solid interfaces. Nonspecular phenomena associated with rapid phase variations neat critical angles are accurately described. The principal re striction is that the solid is sufficiently thick that internal reflections may be ignored. (C) 2001 Acoustical Society of America.