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Table 1 Murmur frequency resolution for STFT (Fig. 4A, and Figs. 7(A-D))

From: Heart energy signature spectrogram for cardiovascular diagnosis

Window size, w Mean frequency, Hz Half-bandwidth, Hz Peak frequency, Hz Low Frequency, Hz High frequency, Hz
HES 107.5 53.7 112.9 53.76 161.29
16 114.4 114.4 37.68 0 228.79
256 113.0 24.22 99.59 88.8 137.3
1024 113.0 21.53 102.28 91.5 123.6
  1. Sampling frequency – 11 kHz. Half bandwidth, low frequency and high frequency are estimated from the spectral plot at 50% of maximum magnitude.