amplitude spectrum
hi, how do i plot the amplitude spectrum of speech segment with a given sampling frequency fs, a given length and known number of bits. thanis in advance
John Williams answered .
2025-11-20
plot(psd(spectrum.periodogram,x,'Fs',fs));
If you do not want it in dB:
psdest = psd(spectrum.periodogram,x,'Fs',fs);
plot(psdest.Frequencies,psdest.Data);
xlabel('Hz'); grid on;
xdft = fft(x);
% assume x is even length
xdft = xdft(1:length(x)/2+1);
freq = 0:fs/length(x):fs/2;
plot(freq,abs(xdft));
xlabel('Hz');