The space and time statistical characteristics of high intensity diffracting acoustical noise are theoretically investigated. It is established that nonlinearity leads to a "spreading" of the energy along the spectrum and, in the same way, has a strong additional effect on the frequency-dependent diffraction effects. The dependences of the radius of correlation on the distance and the cross section of the correlation function in the space-time coordinates are built for different relations between the nonlinear and diffraction lengtns.
Department of General Physics and Wave Processes, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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