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Acoustic information about upper limb movement in voicing.

Wim Pouw1,2,3, Alexandra Paxton4,5, Steven J Harrison4,6

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The human voice reflects bodily tension, allowing listeners to perceive vocalizers' physical movements through sound alone. This reveals a direct link between vocal acoustics and the perception of dynamic bodily states.

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Area of Science:

  • Acoustic phonetics
  • Motor control
  • Human perception

Background:

  • The human voice possesses complex acoustic qualities.
  • Recent evidence suggests vocal production is constrained by bodily tension affecting the respiratory-vocal system.

Purpose of the Study:

  • To investigate the coupling between peripheral musculoskeletal tensioning and vocal acoustics.
  • To determine if auditory perception of voice acoustics can convey information about a vocalizer's dynamic physical state.

Main Methods:

  • Human vocalizers produced steady-state vocalizations while rhythmically moving their wrist or arm at various tempos.
  • Listeners, unable to see the vocalizers, synchronized their own movements to the perceived rhythm in the voice acoustics.

Main Results:

  • Listeners accurately synchronized their own rhythmic movements with the perceived movements embedded in the vocalizations.
  • Auditory perception of voice acoustics was sufficient to convey information about the vocalizer's dynamic physical state.

Conclusions:

  • The human voice contains a 'bodily imprint' directly linked to peripheral musculoskeletal tension.
  • Vocal acoustics provide informative cues for the interpersonal perception of another's dynamic physical states.