Abstract: A method for ultrasonic inspection of materials in which a reception and processing of ultrasonic vibrations reflected from a material being inspected is followed by separating signals from noise at a level that for each period of radiating ultrasonic vibrations is automatically set to be equal to the mean noise power per interval of time selected within the maximum sensitivity zone of a preceding period of radiating ultrasonic vibrations.

Abstract: According to the proposed method for ultrasonic inspection of materials, a eception and processing of ultrasonic vibrations reflected from a material being tested are followed by separating signals from noise at a preset level, which is carried out by means of time selection of signals performed within time intervals during which the signals' amplitudes exceed the preset level. In the device for effecting the method of this invention, an output of an ultrasonic generator, whose input is connected to one of the outputs of a synchronizer, is connected to an input of an ultrasonic converter acoustically coupled to the material being tested. An output of the ultrasonic converter is connected to an input of a reflected ultrasonic vibrations preprocessing unit whose output is electrically coupled to one of inputs of a signals recording unit.