M. : Mechanical Engineering, 1981. — 184 s. : il. The book discusses the phenomenon of acoustic emission (AE) in metals and the possibility of using AE for non-destructive testing of welded compounds. The principles of using AE for control of welding processes are described. The questions of reception and measurement of AE signals are considered, the designs of converters are described, the functional schemes of devices are given. Much attention is paid to the practical application of the AE method and equipment. The book is intended for engineering and technical workers associated with the application of non-destructive testing methods.