This manual is aimed at a comprehensive study of the phenomenon of bioecholocation. The manual contains theoretical material on the main issues related to the topic of the history of science, zoology, thermodynamics, physics of wave processes, acoustics, equations of mathematical physics. Information beyond the scope of the secondary school curriculum is explained directly in the text in the shortest and most accessible form. To improve the assimilation of the material the manual is accompanied by tables and figures. The manual is intended for undergraduates and postgraduates specialising in biology, biophysics, medicine and applied physics.