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Table 2 Performance of the different HS localization methods, HHA and SSA for the synthetic mixtures of normal HS and normal LS at three different flow rates

From: An automated tool for localization of heart sound components S1, S2, S3 and S4 in pulmonary sounds using Hilbert transform and Heron’s formula

TF

Method

Error (%)

ACC

DER

ET

  

FNR

FPR

(%)

(%)

(Sec)

L

HHA

0.0 ± 0.0

1.05 ± 0.04

99.15 ± 0.03

0.83 ± 0.03

0.38 ± 0.01

L

SSA

24.63 ± 0.18

0.0 ± 0.0

96.05 ± 0.02

3.94 ± 0.02

1.39 ± 0.01

M

HHA

0.00 ± 0.0

2.42 ± 0.34

98.00 ± 0.27

1.99 ± 0.27

0.38 ± 0.01

M

SSA

28.10 ± 0.18

0.0 ± 0.0

95.49 ± 0.03

4.49 ± 0.03

1.39 ± 0.01

H

HHA

0.0 ± 0.0

5.46 ± 0.31

95.63 ± 0.23

4.35 ± 0.23

0.38 ± 0.01

H

SSA

34.90 ± 0.14

0.0 ± 0.0

94.40 ± 0.05

5.59 ± 0.05

1.39 ± 0.01

  1. TF: Types of Flows; FNR: False Negative Rate; FPR: False Positive Rate; ACC: Accuracy; DER: Detection Error Rate; ET: Execution Time.