Figure 8From: Heart energy signature spectrogram for cardiovascular diagnosis(A, B, C, D). STFT Heart Sound Time Resolution (same heart sound that is shown in Figs. 3A and B, sampling rate 11 kHz). A) Power Plot HES. B) Power Plot STFT, window w = 16. C) Power Plot STFT, window w = 256. D) Power Plot STFT, window w = 1024.Back to article page