matlab:spectrogram

matlab:spectrogram

%% Spectrogram takes the STFT of the signal
win      = floor(Fs/32);
noverlap = floor(win/4); % 75% overlap
Nfft = Fs;
% P matrix contains the power spectral density of each segment of the STFT
[S,F,T,P] = spectrogram(data, win, noverlap, Nfft, Fs);

fh = figure(1); clf;
imagesc(T, F, real(S));
colorbar;
ax = gca; ax.YAxis.Exponent = 0;
set(gca,'YDir','normal') 
ylim([17500 18500]);
xlabel('Time (s)');
ylabel('Frequency (Hz)');
title('Time-Frequency plot of a Audio signal');