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Table 6 Performance of the different HS localization methods, HHA and SSA for the real time recorded lung sounds 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

2.50 ± 0.33

98.15 ± 0.21

1.83 ± 0.21

0.23 ± 0.01

L

SSA

25.84 ± 0.99

0.69 ± 0.47

95.42 ± 0.78

4.56 ± 0.78

1.45 ± 0.01

M

HHA

0.0 ± 0.0

5.83 ± 0.10

95.59 ± 0.33

4.40 ± 0.33

0.23 ± 0.01

M

SSA

29.19 ± 0.52

1.24 ± 0.97

92.96 ± 0.87

7.03 ± 0.89

1.45 ± 0.01

H

HHA

0.0 ± 0.0

11.66 ± 0.80

93.05 ± 0.59

6.94 ± 0.59

0.23 ± 0.01

H

SSA

36.25 ± 0.61

1.53 ± 1.44

90.40 ± 1.68

9.59 ± 1.68

1.45 ± 0.01

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