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Related Experiment Videos

Remapping auditory-motor representations in voice production.

Jeffery A Jones1, K G Munhall

  • 1Department of Psychology, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5, Canada. jjones@wlu.ca

Current Biology : CB
|October 11, 2005
PubMed
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Speakers adapted their vocal pitch when auditory feedback was altered, demonstrating rapid learning of auditory-motor maps. This vocal learning generalized to new tones but was stronger for the trained tone, indicating target-dependent adaptation.

Area of Science:

  • Neuroscience
  • Speech Science
  • Auditory-Motor Integration

Background:

  • Motor systems learn neural maps for precise control, as seen in limb movements.
  • Speech production requires intricate sensorimotor control, but underlying representations are poorly understood.

Purpose of the Study:

  • To investigate the existence and nature of auditory-motor maps in human speech production.
  • To demonstrate learning of auditory-motor relationships by manipulating vocal pitch feedback.

Main Methods:

  • Mandarin speakers produced words with specific pitch patterns (tones).
  • Auditory feedback fundamental frequency was incrementally shifted upwards during speech.
  • Vocal pitch adjustments were measured in response to altered feedback and subsequent return to normal.

Related Experiment Videos

Main Results:

  • Speakers automatically compensated for pitch feedback shifts by lowering their vocal pitch.
  • Upon feedback normalization, speakers significantly increased vocal pitch beyond baseline.
  • Adaptation generalized to untrained tone categories but was more pronounced for the trained tone.

Conclusions:

  • Speech production exhibits rapid, adaptive learning of auditory-motor relationships.
  • This vocal learning demonstrates a target-dependent recalibration of auditory-motor maps.
  • Findings suggest a flexible sensorimotor system for speech that can quickly adjust to altered sensory feedback.