The authors have estimated the coefficient of PCG AR (p) model to be the sample characteristic vector by the Burg algorithm and the theory of the steady random process. One PCG recognition area has been deter mined according to the coefficient.

• 作者运用平稳随机过程的理论；采用Burg递推算法估算出的心音AR(p)模型的系数为样本特征矢量；给出1个心音辨识置信区域.