Table 1 Classification of Front CAB (0.5-BF) waveform.

From: Extraction of apex beat waveform from acoustic pulse wave by sound sensing system using stochastic resonance

  1. (a) The upper half of the Criteria table indicates the classification points by visual inspection of Front CAB (0.5-BF). We conducted analysis of each waveform, using PSD (power spectral density) when focusing on amplitude, STFT on amplitude and phase, and a correlogram to check if they have periodicity. We classified the waveforms in accordance with the criteria described in the lower part of the table.
  2. (b) This shows that the visual classification of the waveforms of Front CAB (0.5-BF) corresponds quite well to classification by PSD analysis, STFT and correlogram.
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