| Sustained vowel (resonance) | B1 (1st formant’s bandwidth) |
| B2 (2nd formant’s bandwidth) |
| B3 (3rd formant’s bandwidth) |
| f1_dB (1st formant’s energy) |
| f2_dB (2nd formant’s energy) |
| f3_dB (3rd formant’s energy) |
| Sustained vowel (perturbation) | HNR (harmonics to noise ratio) |
| NHR (noise to harmonic ratio) |
| jit_local (jitter local) |
| shim_local (shimmer local) |
| Sustained vowel & connected speech (prosody) | f0 (fundamental frequency) |
| Q-tone (quarter tone) |
| intensity (dBSPL) |
| sd_int (standard deviation of intensity) |
| Sustained vowel connected speech (spectral & cepstral parameters) | Cepstrum | CPP (cepstral peak prominence) |
| CPPs (smoothed CPP) |
| RNR (rhamonics to noise ratio) |
| Spectrum | skewness |
| COG (center of gravity) |
| LH-ratio (low to high ratio) |
| slope_ltas |
| tilt (=spectral slope) |
| offset (=intercept) |
| lowE (low energy, 0−4,000 Hz) |
| highE (high energy, 4,000−8,000 Hz) |
| entireE (entire energy, 0−8,000 Hz) |