NONLINEAR-INTERACTION OF NONCONCENTRIC SPHERICAL WAVES

A high-frequency asymptotic solution of the problem of interaction between two nonconcentric harmonic spherical waves in an unbounded homogeneous fluid medium is obtained in the quasilinear approximation. The resulting expression describes not only phenomena associated with the cumulative growth of the sound field in space, but also the transition from noncumulative to cumulative interactions. The high-frequency asymptotic behavior of the sound field far from primary sources is determined for a dispersive and (or) absorbing medium.