The book outlines a general theory of aerodynamic sound generation and its propagation in a heterogeneous medium. The results of theoretical and experimental studies of acoustic characteristics of jets . The solution of the problem of profile noise, free rotor and rotor. Placed in the channel. The solution of the problem of sound propagation in the channel with flow and the choice of parameters of sound-absorbing claddings of channel walls is considered. The book is intended for aviation industry engineers. It can be useful for scientists engaged in the study of aerodynamic sound sources and the development of methods to combat aerodynamic noise in various industries.