关于带通带阻滤波器的设计，巴特沃思滤波器 压缩包里有： bendpass.m 为带通程序 bendblock.m 为带阻程序 SE144.wav 采用的声音文件，请放在 C:\\下 bendpass.wav 通过带通滤波器之后的声音，保存在C:\\ bendpass.wav bendblock.wav 通过带阻滤波器之后的声音，保存在C:\\ bendblock.wav -on Bandpass Filter with the design, Butterwor

通带截止频率 =2 4k rad/s，阻带截止频率 =2 8k rad/s，通带波纹系数 =0.3dB, 阻带波纹系数 =50dB,采样频率fs=20000Hz。-The digital filter are the digital signal processing important content, the digital filter may divide into IIR and the FIR two main kinds. As for the IIR digital filter

信号分析与处理中的频率域数字滤波程序，包括带通和带阻滤波-Signal analysis and processing of frequency-domain digital filtering program

butterworth 低通滤波器的实现ButterWorth滤波器的低通、高通、带通、带阻功能。-Low pass filter to achieve low pass, high pass, band pass, band stop function of ButterWorth filter.