LINEAR AND NONLINEAR SOUND-PROPAGATION IN TURBULENT AND INHOMOGENEOUS-MEDIA

The author of this paper was among the first to conduce experiments on sound propagation in a turbulent atmosphere (1939-2952). The results obtained were interpreted in terms of the Kolmogorov-Obukhov statistic al theory of local isotropic turbulence and were among the first exper imental verifications of this theory. The Kolmogorov-Obukhov theory an d related experiments provided an impetus to develop subsequent, more extensive studies of the interactions between turbulence and waves. Th e theory continues to be used as the basis for the analysis of signals and the computer simulation of acoustic and electromagnetic wave prop agation in a turbulent medium. Examples of ''turbulence and nonlineari ty'' problems are considered here.