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Table 2 Statistics of SMR gains

From: An automatic segmentation method for heart sounds

UMich no. Heart sound types Length (s) Cycle number SMR gains
ALPF WPT 200LPF
6 Early Systolic Murmur, Apex 60 66 9.64 8.31 0.91
7 Mid Systolic Murmur, Apex 67 72 15.84 12.86 9.50
8 Late Systolic Murmur, Apex 61 63 8.64 7.29 7.52
9 Holosystolic Murmur, Apex 60 63 8.20 6.13 5.90
4 Mid Systolic Click, Apex 60 72 5.99 3.11 0.37
10 Systolic Click and Late Systolic Murmur, Apex 64 72 5.79 3.12 0.95
11 S4 and Mid Systolic Murmur, Apex 65 72 17.29 11.12 11.88
12 S3 and Holosystolic Murmur, Apex 64 87 11.54 10.25 10.68
16 Early Diastolic Murmur, Aortic 61 81 0.765 0.55 0.51
21 Ejection Systolic Murmur and Transient Split S2, Pulmonic 56 75 5.94 3.21 0.86
22 Split S2 and Ejection Systolic Murmur, Pulmonic 66 78 6.81 3.20 1.26
23 Ejection Systolic Murmur and Single S2 and Ejection Click, Pulmonic 75 87 7.51 3.70 0.79
Arithmetic Average ± SD 8.66 ± 4.52 6.07 ± 3.88 4.26 ± 4.51
Weighted Average ± SD 8.59 ± 4.37 5.99 ± 3.76 4.21 ± 4.37
  1. The italic values are represent the optimal results, compared with the results achieved in other methods/studies