untitled.m

这是本人用Matlab实现音频噪声滤除的试验

clear all;
close all;
m=hamming(30)
[M,w]=freqz(m,1,100);
subplot(3,1,1)
plot(20*log(abs(M)))
xlabel('Frequency (Hz)')
ylabel('Magnitude in dB form')
title('frequency response of hamming window ')
n=hanning(30)
[N,w]=freqz(n,1,100);
subplot(3,1,2)
plot(20*log10(abs(N)))
xlabel('Frequency (Hz)')
ylabel('Magnitude in dB form')
title('frequency response of hamming window ')
b=blackman(30)
[B,w]=freqz(b,1,100)
subplot(3,1,3)
plot(20*log(abs(B)))
xlabel('Frequency (Hz)')
ylabel('Magnitude in dB form')
title('frequency response of hamming window ')