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Table 1 Statistics of SMR

From: An automatic segmentation method for heart sounds

UMich no. Heart sound types Length (s) Cycle number SMR A /db SMRWPT/db SMR200/db SMROri/db
6 Early Systolic Murmur, Apex 60 66 24.24 22.91 15.52 14.60
7 Mid Systolic Murmur, Apex 67 72 28.34 25.37 22.01 12.51
8 Late Systolic Murmur, Apex 61 63 30.27 28.93 29.16 21.64
9 Holosystolic Murmur, Apex 60 63 24.26 22.20 21.96 16.07
4 Mid Systolic Click, Apex 60 72 25.12 22.25 19.50 19.14
10 Systolic Click and Late Systolic Murmur, Apex 64 72 29.03 26.35 24.18 23.23
11 S4 and Mid Systolic Murmur, Apex 65 72 34.35 28.18 28.93 17.06
12 S3 and Holosystolic Murmur, Apex 64 87 27.63 26.35 26.77 16.09
16 Early Diastolic Murmur, Aortic 61 81 32.12 31.92 31.88 31.37
21 Ejection Systolic Murmur and Transient Split S2, Pulmonic 56 75 26.41 23.68 21.33 20.47
22 Split S2 and Ejection Systolic Murmur, Pulmonic 66 78 18.07 14.46 12.52 11.26
23 Ejection Systolic Murmur and Single S2 and Ejection Click, Pulmonic 75 87 24.30 20.20 21.96 16.07
Arithmetic average ± SD 26.95 ± 4.30 24.42 ± 4.54 22.61 ± 5.86 18.35 ± 5.41
Weighted average ± SD 26.92 ± 4.14 24.38 ± 4.43 22.61 ± 5.67 18.39 ± 5.29
  1. The italic values are represent the optimal results, compared with the results achieved in other methods/studies