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Table 7 Comparison of the percentage results obtained with the STFT and with the FT

From: Signal processing of heart signals for the quantification of non-deterministic events

Signal used

% of non-deterministic energy

 

Fourier Transform

Short-Time Fourier Transform

Pre-recorded PCG 1

35.18%

36.11%

Pre-recorded PCG 2

6.82%

6.87%

Pre-recorded PCG 3

47.81%

46.81%

Karim stethoscope signal 1

48.40%

45.17%