AE method of nondestructive check is based on exertion waves radiation and their registration during fast local material structure reorganization. It is used as a means of analysis of materials, constructions, productions control and diagnosis during operating time. When registering signal amplitude it is required to consider its frequency distribution connecting each amplitude rate with the corresponding vibration rate. With the purpose to reduce the measurement error it is required to perform receiving piezoelectric converters calibration right on the tested unit and in the process of test analysis consider “unit-converter” transfer characteristic.

The term “acoustic emission” means radiation processes of exertion waves which are produced by internal sources located in the thickness of material under investigation. Acoustic emission method is used as a means of analysis of materials, constructions, productions control and diagnosis during operating time. Energetic parameters as the acoustic emission energy itself may be obtained only based on the whole spectrum analysis. It is strictly contraindicated to measure signal energy in narrow band, naming such measures as “energetic parameters”. Energetic parameters as the acoustic emission energy itself may be obtained only based on the whole spectrum analysis.