_extract_voice_quality(sound) using Praat point-process analysis.
Elevated jitter and shimmer correlate with vocal effort, fatigue, and emotional distress. Decreased HNR signals breathiness or hoarseness.
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Jitter, shimmer, and HNR
_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 |