openSMILE

openSMILE is a toolbox developped by audEERING

The python interface is used to extract GeMAPS and eGeMAPS feature sets.

Features

All features are described in the following paper: GeMAPS-paper

Frequency related parameters
Pitch	logarithmic F0 on a semitone frequency scale, starting at 27.5 Hz (semitone 0).
Jitter	deviations in individual consecutive F0 period lengths.
Formant 1, 2, and 3 frequency	centre frequency of first, second, and third formant.
Formant 1	bandwidth of first formant.

Energy/Amplitude related parameters
Shimmer	difference of the peak amplitudes of consecutive F0 periods.
Loudness	estimate of perceived signal intensity from an auditory spectrum.
Harmonics-to-Noise Ratio (HNR)	relation of energy in harmonic components to energy in noise-like components.

Spectral (balance) parameters
Alpha Ratio	ratio of the summed energy from 50–1000 Hz and 1–5 kHz
Hammarberg Index	ratio of the strongest energy peak in the 0–2 kHz region to the strongest peak in the 2–5 kHz region.
Spectral Slope 0–500 Hz and 500–1500 Hz	linear regression slope of the logarithmic power spectrum within the two given bands.
Formant 1, 2, and 3 relative energy	as well as the ratio of the energy of the spectral harmonic peak at the first, second, third formant’s centre frequency to the energy of the spectral peak at F0.
Harmonic difference H1–H2	ratio of energy of the first F0 harmonic (H1) to the energy of the second F0 harmonic (H2).
Harmonic difference H1–A3	ratio of energy of the first F0 harmonic (H1) to the energy of the highest harmonic in the third formant range (A3).