Hey I plotted this function of my recorded voice using an fft, I dont quite understand the corresponing frequency response graph, can someone help me see where I went wrong? It is a sample of my own voice, but the fft analysis shows frequency components at much higher frequencies, i.e. 700Hz and 1200Hz. I posted the code, and the graph below.
[y,Fs] = audioread(filename);Length = length(y)Mono = (y(:,1)+y(:,2))/2;y = Mono;time=(1:length(y))/Fs;F = 1./time;NFFT = 2^nextpow2(Length)f = Fs/2*linspace(0,1,NFFT/2+1);Y = fft(y,NFFT)/Length;plot(f,2*abs(Y(1:NFFT/2+1)))
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