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. 2018 Apr 6;9:224. doi: 10.3389/fneur.2018.00224

Table 1.

Acoustic measures that were included in the analyses.

Abbreviation Description
F0mean Mean fundamental frequency
F0sd Standard deviation of fundamental frequency
F0max Max of fundamental frequency
F0min Min of fundamental frequency
F0rg Range of fundamental frequency
F0CoV Coefficient of variation of F0
INTmean Mean intensity
INTsd Standard deviation of intensity
INTmax Max intensity (95%)
INTmin Min intensity (5%)
INTrg Range of intensity
relen1000dB Relative energy of 1–8 kHz (dB)
relen500dB Relative energy of 500 Hz to 8 kHz (dB)
alpha_ratio Relative energy of 1–5 kHz (dB)
H1H2 H1H2 level difference
DurV Duration of voiced-only parts of speech
DurU Duration of unvoiced-only parts of speech
DurSil Duration of silences
Dur Total duration
DurV/DurS Duration of voiced segm. over articulated duration
JIT Jitter
SHIM Shimmer
hamm Hammarberg index
mn_int < 1k_VoicedOnly Mean energy 0–1,000 Hz
HNR Mean harmonics-to-noise ratio