Vibrato
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Periodic oscillations of one of more voice characteristics during phonation. Frequency, intensity, timbre, airflow, and vocal tract resonances can all vary in a regular fashion, and many of these factors can vary in or out of phase with each other. The most obvious oscillation in singing is the frequency vibrato, which is a periodic oscillation above and below the mean frequency. The three main acoustic metrics of vibrato are rate (how many oscillations per second, measured in Hertz), extent (how far from the mean value does the frequency change, measured in cents or %), and jitter percentage (how regular are the periods of the vibrato cycle). Typical norms are a rate of 5-7 Hertz and an extent of plus or minus 50 cents.[1]
- ↑ "NATS July 2022 Pedagogy Workshop Working Group Three Science-Informed Terminology and Definitions for Voice Pedagogy" (PDF). Science-Informed Voice Pedagogy Resources. Retrieved March 9 2025.
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