TABLE 2. Feature-importance ranking for HMM feature selection. Dark green marks the most important features, while higher ranks in dark purple indicate lower importance. Corresponding LDA rankings are provided in the Supplementary Material A, Table 5.

Feature	MI	SFS	Feature	MI	SFS
Zero-Crossing Rate	4	28	MFCC16	22	4
Root-Mean-Square Energy	1	7	MFCC17	37	16
Spectral Centroid	3	39	MFCC18	11	27
Spectral Bandwidth	2	44	MFCC19	33	10
Spectral Contrast	20	2	MFCC20	15	43
Spectral Rolloff	6	46	MFCC21	25	12
Spectral Flatness	7	24	MFCC22	18	30
MFCC0	28	9	MFCC23	45	23
MFCC1	5	8	MFCC24	23	45
MFCC2	24	22	MFCC25	42	18
MFCC3	10	33	MFCC26	32	37
MFCC4	27	42	MFCC27	34	5
MFCC5	13	1	MFCC28	30	41
MFCC6	19	26	MFCC29	44	32
MFCC7	29	14	MFCC30	26	19
MFCC8	31	3	MFCC31	46	31
MFCC9	38	34	MFCC32	16	38
MFCC10	43	29	MFCC33	36	6
MFCC11	35	21	MFCC34	17	20
MFCC12	9	13	MFCC35	41	17
MFCC13	14	36	MFCC36	12	25
MFCC14	8	15	MFCC37	40	11
MFCC15	39	35	MFCC38	21	40