Preface. Sound propagation in moving media with regular inhomogeneities. History and modern applications of acoustics in a moving medium: historical review; effects of temperature and wind velocity on sound propagation in the atmosphere; effects of currents on sound propagation in the ocean. Equations for acoustical and internal gravity waves in an inhomogeneous moving medium: system of fluid-dynamic equations and their linearization; a rigorous equation for acoustic and internal gravity waves in the stratified medium; equations for acoustical waves in the three-dimensional inhomogeneous medium; parabolic equation for sound waves. Geometric acoustics in an inhomogeneous moving medium: geometrical acoustics in space and time varying medium; the eikonal equation and equation for acoustic energy conservation in a stationary moving medium; sound propagation in a three-dimensional inhomogeneous medium; refraction laws for sound ray and normal to the wave front in a stratified medium; a ray theory of sound propagation in a stratified medium; the eikonal and sound ray path at small medium speed (the effective sound speed). Wave theory of sound propagation in a stratified moving medium: basic equations of wave theory; acoustic fields due to a plane wave and point source in a homogeneous flow (reflection of the plant wave from a homogeneous moving layer); high-frequency approximations for the acoustic fields of a plane wave, point source and antenna; an integral representation of the high-frequency field of the point course located above an impedance surface in a stratified medium; representation of the high-frequency field of the point source above an impedance surface as the sum of the fields corresponding to the sound rays; the discrete spectrum of a point source field. The sound field due to a moving source: the acoustic field of the moving point source in a homogeneous motionless medium; the acoustic field due to a moving source in an inhomogeneous moving medium; sound aberration and the change in direction of propagation of the sound wave emitted by a moving source. Doppler effect in an inhomogeneous moving medium.

Sound propagation and scattering in moving random media. Random inhomogeneities in a moving medium; starting equation; statistical description of random inhomogeneities. Statistical moments of the sound field in a moving random medium: scattering cross section; Rytov and parabolic equation methods.(Markov approximation); statistical moments of o, x and p for Kolmogorov, Gaussian and von Karman spectra of turbulence; effects of the mean medium motion on the statistical moments of the sound field; theory of multiple scattering (mean field); coherence function. Bibliography. Captions. Index.