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Shimmer: Cycle-to-Cycle Variation in Amplitude

The amplitude counterpart of jitter, separated from it deliberately: students conflate the two, and the pairing only becomes informative once each is defined against its own axis, timing versus loudness. Also on the seed paper's list of unmeasured voice-quality measures.

Questions this Concept answers

Why are jitter and shimmer reported as two measures rather than combined into one?

jeremy Text

Jitter vs Shimmer in Voice Analysis: What Each Measures and When to Use Them

Shimmer is the cycle-to-cycle variation in the amplitude of vocal fold vibration, the loudness axis counterpart to jitter, which varies on the timing axis as cycle-to-cycle variation in pitch period.…