← Symptoms
Gug arpeggios: keep a steady thickness in the low range Mum exercise: build a stable closure-plus-thickness combination Octave slides: feel the smooth thick-to-thin transition Fold Balance chart Weak Contraction (TA)
Unstable Thickness
收缩力不稳定
SonaLab is a voice analysis and training tool, not a medical device. Symptom detection and scores are for reference only and do not constitute medical advice or diagnosis. Consult a qualified physician for persistent voice discomfort.
In the low range the folds flip between thick and thin; the contraction isn't stable yet.
In One Sentence
In the low range (mean F0 below roughly 250Hz) with pitch roughly steady, fold thickness (H1-H2) swings back and forth within about a second — the contraction (the main force keeping the folds thick) isn't stable yet.
How to Read It
Watch the Fold Balance chart in the low range. If the thickness needle keeps swinging — low notes alternating between solid and thin — that's the hint.
Why Does This Happen?
| Cause | Description |
|---|---|
| Unsteady thick vibration | The heavy mode can't be maintained; the voice flickers |
| Unsteady breath support | When airflow wobbles, thickness wobbles with it |
| Breathy low-note habit | Bouncing between thick and airy |