soudcarddemo.m

基于MATLAB的声音信号频谱分析仪源代码

AI=analoginput('winsound',0);
addchannel(AI,1);
freq=8000;
set(AI,'SampleRate',freq);
duration=2;
set(AI,'SamplesPerTrigger',duration*freq);
start(AI);
data=getdata(AI);
fftdata=abs(fft(data));
mg=20*log10(fftdata);
mag=mag(1:end/2);