The analysis of AE signals is executed, mouldable at destruction of composition material under the action of loading of change. Description of processes is conducted is model and simplest. It is considered, how resilient properties of standard change depending on the enclosed loading, and also it is rotined that the change of axial tension on fibres takes a place at their destruction as a result of achievement of the critical loadings of stretching and bending. This tension changes continuously. However at the beginning of process of destruction this tension can have breaking or continue to grow, but with less speed. At such character of change of dependence of axial tension in time to define (to fix) beginning of process of destruction of fibres of standard possibly only subject to the condition implementation of complete cycle of loading. It is rotined that the AE signals arise (begin to be formed) up directly in the point of beginning of destruction of standard, regardless of type of destruction of fibres (stretch or bend). Registration of AE signals in the process of loading of composite material can be executed for control of achievement of the maximum possible loadings, beginning which irreversible destruction of composite. It is marked, that the AE signals, which are registered at the tests of composite materials have pain composition forms which differ from considered, are real. It is conditioned, foremost, by the simplest description of the presented models which foresee gradual slow enough destruction of fibres. In addition, at description of acoustic radiation it is necessary to take into account more difficult character of redistribution of tensions in composite material, and also kinetics of process of destruction.