P.O. Pavlovichev – Post-graduate Student, P.G. Demidov Yaroslavl State University E-mail: assault74@rambler.ru

A.L. Priorov – Dr.Sc. (Eng.), Associate Professor, P.G. Demidov Yaroslavl State University

E-mail: andcat@yandex.ru

A.I. Topnikov – Ph.D. (Eng.), Associate Professor, P.G. Demidov Yaroslavl State University E-mail: topartgroup@gmail.com

The paper is devoted to an empirical mode decomposition – it is a method that allows to analyze non-stationary signals. Initial mathematical formula of the difference is demonstrated that proposed by authors of the decomposition method, and we show that its practical application can lead to criterion incorrect operation that embarrasses the mode sifting. We propose the transformed mathematical formula of the quadratic difference that provides the criterion proper operation, and we demonstrate modeling results for a test and speech signal.

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