Measurements Included
F0 (Fundamental Frequency): The basic vibration rate of the vocal folds, perceived as pitch.
Jitter: Cycle-to-cycle variation in pitch. Elevated values may indicate vocal instability.
Shimmer: Cycle-to-cycle variation in amplitude. Elevated values may indicate incomplete vocal fold closure.
HNR: Ratio of harmonic to noise components. Lower values indicate more breathiness or hoarseness.
CPPS: A robust measure of voice quality that correlates well with perceived dysphonia severity.
Recording Tips for Best Results
What to Record
Sustained vowel /a/ for 3-5 seconds
Environment
Quiet room, consistent volume
What to Avoid
Background noise, pitch variations, breathy onset
Any Device Works
Phone, computer, or any recording app
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