Table 3.

Quantitative estimation of positioning

UMich no.	Heart sound types	Length (s)	Cycle number	TP	FN	FP	TN	Se/ %	PPV/ %	Acc/ %
1	Normal S1 and S2, Apex	69	87	174	0	0	0	100	100	100
2	Split S1, Apex	71	102	204	0	0	0	100	100	100
3	S4 Gallop, Apex	75	93	279	0	0	0	100	100	100
4	Mid Systolic Click, Apex	60	72	144	0	2	0	100	98.63	98.63
5	S3 Gallop, Apex	68	81	243	0	0	0	100	100	100
6	Early Systolic Murmur, Apex	60	66	132	0	0	0	100	100	100
7	Mid Systolic Murmur, Apex	67	72	144	0	0	0	100	100	100
8	Late Systolic Murmur, Apex	61	63	126	0	0	0	100	100	100
9	Holosystolic Murmur, Apex	60	63	126	0	0	0	100	100	100
10	Systolic Click and Late Systolic Murmur, Apex	61	72	144	0	0	0	100	100	100
11	S4 and Mid Systolic Murmur, Apex	65	87	261	0	0	0	100	100	100
12	S3 and Holosystolic Murmur, Apex	64	87	261	0	0	0	100	100	100
14	Normal S1 and S2, Aortic	61	69	138	0	0	0	100	100	100
16	Early Diastolic Murmur, Aortic	61	81	162	0	0	0	100	100	100
18	Single S2, Pulmonic	61	69	138	0	0	0	100	100	100
23	Ejection Systolic Murmur and Single S2 and Ejection Click, Pulmonic	75	87	174	0	0	0	100	100	100
Total		1039	1251	2850	0	2	0	100	99.93	99.93