Choose one task
Use the same sentence or sustained vowel each time you compare results.
Voice steadiness measurement
Pitch Stability Test
Read one sentence at an even pace or sustain a comfortable vowel. See a stability score plus variation, semitone span and sample density.
Your stability score and variation metrics will appear here.
100% client-side. Audio is never uploaded. Results are stored only when you choose Save.
Keep volume even
Sudden volume changes and vocal fry can reduce reliable pitch samples.
Compare like with like
Natural conversation should vary more than a sustained comfortable tone.
What the stability score can and cannot tell you
The score is based on the coefficient of variation: standard deviation divided by mean pitch. This allows more useful comparisons across low and high voices than raw Hz variation alone.
Expressiveness is not instability, and a low score can come from room noise or changing speech melody. Clinical measures such as jitter require controlled recordings and specialized analysis.
Frequently asked questions
What is pitch stability?+
It describes how tightly detected pitch samples cluster around the average during a controlled speaking task.
Is a higher score always better?+
No. Expressive speech naturally varies. The score is most useful when repeating the same passage or sustained tone.
How is the score calculated?+
The tool uses variation relative to mean pitch and reports standard deviation, semitone span and sample count.
Can this diagnose a voice disorder?+
No. It is an informal acoustic measurement, not a clinical jitter or pathology assessment.