(1)设计低通、带通、高通数字滤波器；

(2)可以对合成信号(含低频、中频、高频分量)、语音信号进行滤波；

(3)通过GUI界面进行控制。-(1) design low pass, band pass, high pass digital filter

(2) can be synthesized signal (including the low frequency, medium frequency, high frequency components), filtered speech signal

(3) is controlled through the GUI.