you'll see, i'm doing project need use adaptive filter (lms) remove noise audio signal ... , i'm stuck in amnera perform implementation. have nothing sound file in matlab:
[f,fs] = audioread('voz00002.wav'); n = 7; beginfreq = 700 / (fs/2); endfreq = 12000 / (fs/2); [b,a] = butter(n, [beginfreq, endfreq], 'bandpass'); now know do, not if give understand if has proposal ask ask please explain me code complete implementation.
originally had small segment of code teacher disapproved implementation, no longer how this:
n = size(f,1); df = fs / n; w = (-(n/2):(n/2)-1)*df; y = fft(f(:,1), n) / n; y2 = fftshift(y); figure; plot(w,abs(y2)); n = 7; [b,a] = butter(n, [beginfreq, endfreq], 'bandpass'); what @ poitn:
ok, first thing signal (f) of file , sampling frequency (fs). next thing use initial frequency , final frequency, filter signal between these 2 frequencies. , pass band using variable order (n) frequencies. far, able remove background noise (the sound file has voice talking , television noises , people talking in distance). seek implementation doing using adaptive filter, information have found no understanding (sorry bad english)
