Table 12 Abbreviations of the feature names listed in Table 11

F0

Age

F44

(AE) Frequency F2-bandwidth (voiced) AMean

F1

Years of formal education

F45

(ID) Frequency F0-semitonefrom-27.5hz (voiced) 20-80th percentile range

F2

(AE) Spectral flux (voiced) CoV

F46

(AE) Frequency F3-bandwidth (voiced) CoV

F3

(ID) Energy/Amplitude Loudness CoV

F47

(ID) Frequency F2-amplitudelogrelf0 (voiced) AMean

F4

(ID) Temporal-feature Loudness-Peak/second

F48

(ID) Frequency F1-frequency (voiced) CoV

F5

(AE) Ceptral MFCC4 (voiced) CoV

F49

(ID) Ceptral MFCC4 CoV

F6

(AE) Frequency F0-semitonefrom-27.5hz (voiced) Mean rising slope

F50

(AE) Spectral Alpharatio (voiced) CoV

F7

(ID) Energy/Amplitude Shimmer-localdb (voiced) CoV

F51

(ID) Frequency F0-semitonefrom-27.5hz (voiced) Std falling slope

F8

(AE) Frequency F0-semito nefrom-27.5hz (voiced) CoV

F52

(AE) Frequency F3-frequency (voiced) CoV

F9

(AE) Spectral flux (unvoiced) Amean

F53

(AE) Ceptral MFCC3 (voiced) CoV

F10

(AE) Frequency F0-semitonefrom-27.5hz (voiced) 20-80th percentile range

F54

(AE) Spectral Hammarberg index (unvoiced) AMean

F11

(ID) Energy/Amplitude Loudness 20th percentile

F55

(AE) Ceptral MFCC2 CoV

F12

Energy/Amplitude Loudness 50th percentile

F56

Frequency F0-semitonefrom-27.5hz (voiced) 20th percentile

F13

Spectral flux (unvoiced) Amean

F57

Spectral Hammarberg index (unvoiced) AMean

F14

Spectral Alpharatio (unvoiced) AMean

F58

(AE) Energy/Amplitude Loudness Mean falling slope

F15

(AE) Spectral Slope500-1500 (unvoiced) Amean

F59

(AE) Frequency F0-semitonefrom-27.5hz (voiced) Std rising slope

F16

(AE) Frequency F3-bandwidth (voiced) AMean

F60

(AE) Spectral Slope0-500 (unvoiced) Amean

F17

Temporal-feature Unvoiced-Segment-Length/second Mean

F61

(AE) Ceptral MFCC4 AMean

F18

(AE) Frequency F0-semitonefrom-27.5hz (voiced) Mean falling slope

F62

(AE) Ceptral MFCC1 (voiced) AMean

F19

(AE) Frequency F2-bandwidth (voiced) CoV

F63

(AE) Frequency F2-frequency (voiced) CoV

F20

(AE) Frequency F2-frequency (voiced) AMean

F64

Frequency F2-bandwidth (voiced) AMean

F21

Frequency F0-semitonefrom-27.5hz (voiced) CoV

F65

Frequency F3-amplitudelogrelf0 (voiced) AMean

F22

(AE) Spectral Slope500-1500 (voiced) AMean

F66

Frequency F0-semitonefrom-27.5hz (voiced) Mean rising slope

F23

(AE) Temporal-feature Voiced-Segment-Length/second Mean

F67

Spectral flux (voiced) CoV

F24

Spectral Slope500-1500 (voiced) CoV

F68

(AE) Energy/Amplitude Loudness 20-80th percentile range

F25

(AE) Spectral Alpharatio (unvoiced) AMean

F69

(ID) Spectral flux AMean

F26

(AE) Ceptral MFCC1 CoV

F70

(AE) Ceptral MFCC4 (voiced) AMean

F27

(AE) Spectral Harmonic difference H1-H2 (voiced) CoV

F71

(AE) Energy/Amplitude Loudness Std rising slope

F28

(AE) Frequency F0-semitonefrom-27.5hz (voiced) Std falling slope

F72

Spectral Slope500-1500 (unvoiced) Amean

F29

(AE) Energy/Amplitude Loudness 50th percentile

F73

(AE) Spectral flux AMean

F30

(AE) Energy/Amplitude Loudness Mean rising slope

F74

Energy/Amplitude Shimmer-localdb (voiced) AMean

F31

Frequency F3-frequency (voiced) CoV

F75

(AE) Others Equivalent-Sound-Level (dB)

F32

Ceptral MFCC1 (voiced) CoV

F76

Temporal-feature Voiced-Segments/second

F33

(AE) Frequency Jitter-local (voiced) CoV

F77

(AE) Energy/Amplitude Loudness AMean

F34

Spectral Slope500-1500 (voiced) AMean

F78

Frequency F2-frequency (voiced) AMean

F35

(AE) Spectral Slope0-500 (voiced) CoV

F79

Frequency F3-bandwidth (voiced) AMean

F36

(AE) Temporal-feature Loudness-Peak/second

F80

(ID) Ceptral MFCC3 AMean

F37

Ceptral MFCC1 (voiced) AMean

F81

(AE) Ceptral MFCC1 (voiced) CoV

F38

Ceptral MFCC3 (voiced) AMean

F82

Frequency F0-semitonefrom-27.5hz (voiced) 50th percentile

F39

Ceptral MFCC4 (voiced) CoV

F83

(AE) Frequency F1-frequency (voiced) AMean

F40

Ceptral MFCC4 (voiced) AMean

F84

(AE) Spectral Harmonic difference H1-H2 (voiced) AMean

F41

(AE) Energy/Amplitude Shimmer-localdb (voiced) CoV

F85

(ID) Ceptral MFCC2 CoV

F42

(AE) Energy/Amplitude Loudness Std falling slope

F86

Frequency F0-semitonefrom-27.5hz (voiced) Std rising slope

F43

Frequency F2-frequency (voiced) CoV