Index of content:
Volume 109, Issue 2, February 2001
- NONLINEAR ACOUSTICS 
Second-harmonic generation in sound beams reflected from, and transmitted through, immersed elastic solids109(2001); http://dx.doi.org/10.1121/1.1318777View Description Hide Description
Second-harmonic generation in sound beams reflected from and transmitted through thick isotropic elastic solids is investigated experimentally. Measurements of diffraction patterns are compared with a theoreticalmodel based on integral solutions for harmonic generation in sound beams. The solutions are connected by classical linear theory for reflection and transmission at fluid–solid interfaces. Nonspecular phenomena associated with rapid phase variations near critical angles are accurately described. The principal restriction is that the solid is sufficiently thick that internal reflections may be ignored.
109(2001); http://dx.doi.org/10.1121/1.1333418View Description Hide Description
The second harmonic generation of SV shear waves at isotropic solid–solid interfaces is experimentally studied. The amplitude of shear waves is measured for the interfaces of glass–air, glass–iron, glass–copper, and glass–aluminum. The measured angular relation of amplitude of the second harmonic wave is compared with theory and the agreement is reasonably good. The influence of the physical state of the interface on second harmonic generation is also observed. It is found that the second harmonic generation is sensitive to the interface state.