Stress Detection Using Low Cost Heart Rate Sensors

Table 3

Frequency-domain analysis after the synchronization process.

Subject number	Schiller				CardioSport				Error
	Absolute power (ms^2)				Absolute power (ms^2)				%	%	%	%
	VLF	LF	HF	LF/HF	VLF	LF	HF	LF/HF	VLF	LF	HF	LF/HF
#1	7937.6	3086	1578	1.956	8444	3224	1330	2.4235	6.00	4.28	18.65	19.29
#2	5431.5	626.6	245	2.557	5723	659.3	250.9	2.6281	5.09	4.96	2.35	2.71
#3	4251.2	1927	494.4	3.898	4543	2055	538.8	3.8146	6.42	6.23	8.24	2.19
#4	12682	1790	636.5	2.813	13514	1869	621.5	3.0077	6.16	4.23	2.41	6.47
#5	6139.8	1212	476.7	2.542	6465	1274	481.4	2.6459	5.03	4.87	0.98	3.93