Read the bluesky3.wav file (the content is for boys "blue sky, white clouds"), mix 50Hz hum into the voice data, design a band digital filter with Kaiser window, passband cutoff rate 45Hz, band cutoff Frequency 49 and 51, the minimum attenuation of the stop band is A2=50dB, and the sampling frequency is 8000Hz.

Filename	Size	Update
带阻数字滤波器\add_noisedata.m	1050	2013-10-23
带阻数字滤波器\add_noisefile.m	1010	2013-10-23
带阻数字滤波器\bluesky3.wav	38044	2012-06-16
带阻数字滤波器\bluesky31.wav	38044	2013-02-24
带阻数字滤波器\bluesky32.wav	38044	2012-07-23
带阻数字滤波器\factory1.wav	160044	2013-03-03
带阻数字滤波器\Gnoisegen.m	645	2013-05-02
带阻数字滤波器\lvboqi.m	2285	2018-09-02
带阻数字滤波器\polydetrend.m	363	2013-06-08
带阻数字滤波器\SNR_singlech.m	400	2013-05-01
带阻数字滤波器	0	2018-09-02

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