心电波形通过30HZ低通滤波器，中值去基线漂移后的波形，通过窗口法提取波形峰值-get the peaks of ECG wave by 30HZ low pass filter firstly,baseline processing,and window methos.

信号维数的估计，内含心电信号数据及运用MATLAB写的源代码，用平面波展开法计算二维声子晶体带隙。- Signal dimension estimates, ECG data and includes source code written in MATLAB, Computation Method D phononic bandgap plane wave.