F0 is extracted byDocumentation Index
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_extract_f0_features(sound, audio) using Praat’s autocorrelation method via Parselmouth.
| Feature | Unit |
|---|---|
f0_mean | Hz |
f0_std | Hz |
f0_min, f0_max, f0_range | Hz |
f0_confidence | 0–1 |
- Male: 85–180 Hz
- Female: 165–255 Hz
- Auto: 75–300 Hz
f0_range correlates with prosodic flatness — a documented marker in major depressive disorder.