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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Speaking rhythmically can shape hearing.

M Florencia Assaneo1,2, Johanna M Rimmele3, Yonatan Sanz Perl4,5,6

  • 1Department of Psychology, New York University, New York, NY, USA. fassaneo@gmail.com.

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Summary
This summary is machine-generated.

Motor system predictions enhance auditory perception, even in speech. This study demonstrates how speech production influences perception, revealing auditory-motor coupling in individuals and supporting bidirectional neural interactions.

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Area of Science:

  • Auditory perception
  • Speech motor control
  • Neuroscience

Background:

  • Motor system temporal predictions can improve auditory perception.
  • Limited evidence exists for speech perception being modulated by speech production.

Purpose of the Study:

  • To investigate auditory-motor interactions in speech perception.
  • To determine if speech production influences syllable discrimination.
  • To explore the role of individual auditory-motor coupling.

Main Methods:

  • Developed a behavioral protocol linking speech production and perception.
  • Participants performed syllable discrimination after producing periodic syllable sequences at natural and non-natural rates.
  • Utilized a decoding approach to analyze perceptual performance relative to motor rhythm.

Main Results:

  • Perceptual performance was modulated by the stimulus phase linked to the participant's motor rhythm.
  • This auditory-motor interaction was observed in a subgroup with quantifiable auditory-motor coupling.
  • Both natural and non-natural speech rates revealed this effect.

Conclusions:

  • Speech production actively influences speech perception through auditory-motor interactions.
  • Individual differences in auditory-motor coupling strength are crucial for these effects.
  • Findings support a neural model of bidirectional communication between auditory and speech motor cortices.