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Masking auditory feedback does not eliminate repetition reduction.

Cassandra L Jacobs1, Torrey M Loucks2, Duane G Watson3

  • 1University of Wisconsin, Madison.

Language, Cognition and Neuroscience
|August 22, 2022
PubMed
Summary

Repetition reduction in speech duration occurs even without full auditory feedback. This suggests that other sensory inputs, like somatosensory feedback, also contribute to speech production adjustments.

Keywords:
auditory feedbackfeedforward processeslanguage productionrepetition reduction

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Area of Science:

  • Speech production and acoustics
  • Auditory perception and feedback mechanisms
  • Motor control in speech

Background:

  • Repetition typically leads to reduced word duration in speech.
  • Previous theories emphasized auditory feedback as essential for this reduction.
  • The auditory feedback hypothesis posits that hearing a word is necessary for subsequent duration reduction.

Purpose of the Study:

  • To rigorously test the auditory feedback hypothesis.
  • To investigate the role of auditory feedback in repetition-induced speech duration reduction.
  • To explore alternative feedback mechanisms supporting this phenomenon.

Main Methods:

  • Two experiments were conducted to test the auditory feedback hypothesis.
  • Masked auditory feedback was used to limit speakers' self-hearing.
  • Whispering techniques were employed to further restrict auditory feedback during speech production.

Main Results:

  • Repetition reduction in word duration was observed to a similar extent in both masked and unmasked conditions.
  • Limiting auditory feedback did not eliminate the effect of repetition on speech duration.
  • The findings indicate that auditory feedback is not the sole determinant of repetition reduction.

Conclusions:

  • Auditory feedback is not exclusively required for repetition reduction in speech.
  • Somatosensory feedback and feedforward signals likely play significant roles.
  • Speech production adjustments during repetition are supported by multiple sensory and motor systems.