The book introduces the reader to a new area of ​ ​ science and technology that has arisen at the intersection of acoustics, electronics and cybernetics. The main attention is paid to those problems that are of interest to automation, telemechanics and energy. The book is an original scientific study. However, the material is presented in a form that is sufficiently accessible, corresponding to the level of physical and mathematical education of engineers, graduate students and senior students of technical universities. The book can serve as a manual for workers in any branch of science and technology interested in new technology and setting new scientific and engineering tasks.