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Individual differences in vocal size exaggeration.

Michel Belyk1,2, Sheena Waters3, Elise Kanber4

  • 1Department of Speech Hearing and Phonetic Sciences, University College London, London, UK. belykm@edgehill.ac.uk.

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|February 17, 2022
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Summary
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Speakers can alter their vocal tract size to manipulate how their voice sounds, influencing listener perceptions. Individual abilities vary significantly, suggesting potential impacts on social interactions and learned behaviors.

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Area of Science:

  • Acoustic phonetics
  • Speech perception
  • Human communication

Background:

  • The human voice conveys social cues like authority, dominance, and attractiveness.
  • Listeners can be influenced by vocal characteristics, potentially through vocal tract modulation.

Purpose of the Study:

  • To analyze the veridical size of vocal tracts during volitional voice modulation.
  • To correlate acoustic changes with perceived vocal size and listener influence.
  • To investigate individual differences in vocal modulation ability.

Main Methods:

  • Real-time magnetic resonance imaging (rt-MRI) to measure vocal tract size.
  • Acoustic analysis of voice production during intentional size modulation.
  • Listener perception studies to assess influence and accuracy of vocal size cues.

Main Results:

  • Speakers demonstrated volitional control over vocal tract shape and size.
  • Acoustic properties of the voice corresponded to the modulated vocal tract size.
  • Significant individual differences in vocal modulation ability were observed, ranging from low to high proficiency.

Conclusions:

  • Effective vocal size exaggeration is possible and influences listener perception.
  • The ability to modulate vocal size varies substantially among individuals.
  • Further research is needed to explore the link between vocal modulation skill, social manipulation, and the origins of this ability (genetics vs. experience).