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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Jitter and Shimmer(also: Voice perturbation measures, Cycle-to-cycle variability)
Acoustic measures of voice quality that capture short-term irregularity in the vocal fold vibration. Jitter is the cycle-to-cycle variability in pitch (fundamental frequency), while shimmer is the cycle-to-cycle variability in amplitude. Elevated jitter and shimmer are…

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