Application of the wavelet transform on picking up the agitating source positions of heart sound signals

Heart sound signals are a kind of physiology signals which are very important in the diagnosis of many heart diseases. In this paper, based on the generation mechanism of heart sound signals, a paraperiodical agitating model of heart sound signals is created. And the wavelet transform method is applied on the processing of the heart sound signals.This method can pick up the valve’s closing time position accurately,so it gives a criteria to separate the heart signals.The wavelet transform method not only has the feature of good time local location, high calculation efficiency,it is also robust to noise.