Voice quality features are computed byDocumentation Index
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_extract_voice_quality(sound) using Praat point-process analysis.
| Feature | Unit | Normal range |
|---|---|---|
jitter | % | < 1.04 % |
shimmer | % | < 3.81 % |
hnr | dB | > 20 dB |
voice_quality_confidence | 0–1 |