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| Acoustic Feature | Description |
|---|---|
| phrase duration (ms) | phrase segment duration |
| mean f0 (Hz) | mean f0 |
| minimum f0 (Hz) | minimum f0 |
| maximum f0 (Hz) | maximum f0 |
| rising f0 (Hz) | max f0 follows min f0 in phrase |
| falling f0 (Hz) | min f0 follows max f0 in phrase |
| mean RMS (dB) | mean RMS amplitude |
| rising amplitude (dB) | max amp follows min amp in phrase |
| falling amplitude (dB) | min amp follows max amp in phrase |
| amplitude modulation (dB) | SD of amplitude in phrase |
