There are multiple definitions:
amplitude perturbation quotient(English)
- a clinical acoustic measurement that quantifies the cycle-to-cycle involuntary variations in the sound amplitude (volume) of a sustained vowel. Along with frequency perturbation (Jitter), it is a key parameter used to assess vocal "shimmer" and detect voice pathologies
- GNE, HNR, MWC, NVF, PPQ
- Signal analysis, Speaking / language [incl. disorders]
- https://doi.org…nals-10003-1322
Activity and Participation Questionnaire(English)