滤波器设计 　　　产生一个连续信号，包含低频，中频，高频分量，对其进行采样，进行频谱分析，分别设计低通，带通，高通滤波器对信号进行滤波处理，观察滤波前后信号的频谱。-The filter is designed to generate a continuous signal containing the low, mid, and high frequency components, to be sampled, for spectral analysis, respectively, to

在matlab中利用声卡对语音信号进行实时采集，并采集波形图，对采集信号进行频谱分析，画出频谱图，能查找峰值频率。有详细的注释和参数调整说明-In Matlab using real- time audio of the speech signal acquisition and acquisition waveform, Spectral Analysis of Signals and draw the spectrum, can find the peak frequency.A detai