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Related Experiment Video

Updated: Dec 19, 2025

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Vocal Quality After a Performance in Actors Compared to Dancers.

Clara Leyns1, Julie Daelman1, Iris Meerschman1

  • 1Department of Rehabilitation Sciences, Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium.

Journal of Voice : Official Journal of the Voice Foundation
|June 6, 2020
PubMed
Summary

Professional actors exhibit superior vocal capacities compared to non-professionals, though one performance did not significantly alter vocal quality in actors or dancers. Further research is needed on the long-term effects of performing on voice. Keywords: vocal quality, actors, dancers, vocal fatigue.

Keywords:
Acoustic analysisDancersImpactPerformanceTheatre actorsVocal quality

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Area of Science:

  • Performing Arts Medicine
  • Speech and Voice Science

Background:

  • Theater actors are a high-risk population for voice disorders.
  • Understanding vocal load and performance impact is crucial for actor vocal health.

Purpose of the Study:

  • Compare objective and subjective vocal quality among professional actors, non-professional actors, and professional dancers.
  • Investigate the immediate impact of a single theater performance on vocal quality within and between these groups.
  • Hypothesize that actors experience greater vocal fatigue and deterioration than dancers post-performance.

Main Methods:

  • Collected voice recordings (sustained vowels, speech, aerodynamics, voice range profile) from 27 professional actors, 19 non-professional actors, and 16 dancers before and after a performance using PRAAT software.
  • Computed Acoustic Voice Quality Index and Dysphonia Severity Index for objective measures.
  • Utilized the GRBASI scale for auditory-perceptual evaluation and questionnaires for vocal risk factors.

Main Results:

  • Professional actors demonstrated better vocal capacities (e.g., higher fundamental frequency range, longer maximum phonation time) than non-professionals.
  • Professional dancers had higher Acoustic Voice Quality Index values than non-professional actors.
  • No significant differences in objective or subjective vocal quality were found between groups post-performance; however, questionnaires indicated poor vocal habits in professional actors.

Conclusions:

  • Professional actors possess superior vocal capacities compared to their non-professional counterparts.
  • A single performance did not yield significant short-term changes in vocal quality for actors or dancers.
  • Long-term effects of performance on vocal health warrant further investigation.