Problems in Nonlinear Acoustics: Rayleigh Waves, Pulsed Sound Beams, Reflectionof Focused Beams, Waveguides, Cooperative Radiation of Sound by Bubbles, Acoustic Streaming Effects in Standing Waves, and Spark-Source Lithotripter Pulses

摘要

Nine projects are discussed in this annual summary report, all of which involvebasic research in physical acoustics, mainly nonlinear acoustics: (1) Nonlinear Rayleigh Waves, (2) Finite Amplitude Pulses in Liquids with Strong Absorption, (3) Reflection of a Focused Beam from a Curved Target, (4) Finite Amplitude Propagation in a Sound Velocity Channel, (5) Second Harmonic Generation in Pekeris Waveguides, (6) Finite Amplitude Propagation in Multiple Waveguide Modes, (7) Cooperative Radiation and Scattering of Sound by Bubbles, (8) Water Fountains Produced by Intense Standing Waves in Air, and (9) SparkSource Lithotripter Pulses. nonlinear acoustics, waveguides, pulsed beams, layered media, focused beams, surface waves.