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Table 5 Performance of the different HS localization methods, HHA and SSA for the synthetic mixtures of abnormal HS and abnormal 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

4.43 ± 0.60

97.01 ± 0.30

2.97 ± 0.30

0.38 ± 0.01

L

SSA

27.15 ± 1.26

0.0 ± 0.0

90.42 ± 0.47

9.56 ± 0.47

1.39 ± 0.01

M

HHA

0.00 ± 0.0

6.81 ± 0.39

95.59 ± 0.23

4.39 ± 0.23

0.38 ± 0.01

M

SSA

34.83 ± 0.95

0.83 ± 0.20

87.44 ± 0.25

12.54 ± 0.25

1.39 ± 0.01

H

HHA

0.0 ± 0.0

16.37 ± 0.72

90.40 ± 0.35

9.58 ± 0.35

0.38 ± 0.01

H

SSA

45.34 ± 0.64

3.97 ± 0.76

79.25 ± 1.69

20.73 ± 1.69

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.