## Wave Propagation in a Random Medium |

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absence of fluctuations acoustic amplitude and phase amplitude fluctuations amplitude or phase angle approximation assume atmospheric acoustics autocorrelation coefficient averaging calculate center of mass correlation coefficient correlation distance correlation function density fluctuations dependence deviation diaphragm diffraction image dimensions distribution of fluctuations double integral dydz energy experimental exponential function factor ffffff focus Fresnel zone heat conduction hydroacoustics incident wave inhomogeneous medium initial direction integral sine integrand integration with respect intensity introduce Krasilnikov large compared lens limits mass coordinates mean distribution mean square amplitude medium with random method of small neglected observation point obtain phase fluctuations problem quantities random inhomogeneities refractive index fluctuations region relative coordinates Rytov's method scattered waves scattering coefficient scattering formula small compared small perturbations statistical independence takes the form term transverse autocorrelation variable wave equation wave field wave parameter wave propagation wavelength zero