用Ｃ语言编写的用双线形变换法实现的IIR滤波器程序，可以参考一下-C language prepared by the double-linear transformation to achieve the IIR filter process can take a look

语音的IIR滤波程序，可以实现对语音信号的IIR整型滤波-Voice of the IIR filter program, you can achieve integer IIR filtering of speech signals