Nonlinear generation of an acoustic wave by two pump sound waves is studied in a three-phase marine sediment that consists of a solid frame and the pore water with air bubbles in it. To avoid generation of harmonics the interaction is studied in the frequency range where there is a considerable wave velocity dispersion. Nonlinear equations are obtained to describe the interaction of acoustic waves in the presence of air bubbles. An expression for the amplitude of the generated wave is obtained and its dependence on distance and on resonance frequencies of bubbles is numerically analyzed.
M.V. Lomonosov Moscow State University, Research computing center, Moscow 119991, Vorobyovy Gori, Russia
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