进入实验界面后，按“输入语音信号”按钮，录入语音信号的数据。对数据进行频谱分析，给出语音信号的波形图和频谱图。设置系统的截止频率，选择给定的系统类型，建立系统函数，并画出系统的频响图。

5. 语音信号频谱与滤波器频响相乘（即对语音信号进行高、低通滤波），得到输出信号的频谱，将所得结果经过傅里叶反变换函数变换为时域信号，绘出处理后信号的波形图，并分别存档。-Into the experimental interface, press " input speech signal"　button, input speech signal data. Spectral analysis of the data, given the speech signal waveform and frequency spectrum. Set the system' s cutoff frequency, select a given type of system, the establishment of the system function, and draw the frequency response of the system diagram. 5 of speech signal spectrum by multiplying the filter response (i.e., the voice signal is high, the low-pass filter), to obtain the spectrum of the output signal, the result after the inverse Fourier transform function into a time domain signal plot Processing After the signal waveform, and were filed.