Table 1.

Research results: the Bhattacharyya coefficients, for best frequency range, for each feature family, for each class combination. Corresponding frequency ranges are presented in Table 2.

Boxplot Letter (Figure 7)	Class Combination	The Bhattacharyya Coefficient for Feature Family:
		1 (DFT of the Signal)	2 (DFT of the Derivative)	3 (Square of the DFT of the Signal)	4 (Square of the DFT of the Derivative)
a	ctrl, cmp1	0.863	0.844	0.842	0.872
b	ctrl, cmp2	0.634	0.629	0.659	0.662
c	ctrl, cmp3	0.318	0.316	0.453	0.464
d	ctrl, oa	0.308	0.367	0.458	0.462
e	cmp1, cmp2	0.726	0.717	0.769	0.768
f	cmp1, cmp3	0.446	0.442	0.560	0.577
g	cmp1, oa	0.401	0.486	0.587	0.603
h	cmp2, cmp3	0.637	0.667	0.694	0.693
i	cmp2, oa	0.594	0.696	0.741	0.744
j	cmp3, oa	0.900	0.919	0.897	0.876