对心音信号的50hz陷波器设计和MFCC计算，能量的提取-Heart sound signal 50hz notch filter design and MFCC calculation, energy extraction

Notch Filter using matlab

the design of the Notch Filter algorithm is given and the realization of the process in MATLAB is shown.-the design of the Notch Filter algorithm is given and the realization of the process in MATLAB is shown.