Effects of voice harmonic complexity on ERP responses to pitch-shifted auditory feedback

Roozbeh Behroozmand, Oleg Korzyukov, Chuck Larson*

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Objective: The present study investigated the neural mechanisms of voice pitch control for different levels of harmonic complexity in the auditory feedback. Methods: Event-related potentials (ERPs) were recorded in response to. +200 cents pitch perturbations in the auditory feedback of self-produced natural human vocalizations, complex and pure tone stimuli during active vocalization and passive listening conditions. Results: During active vocal production, ERP amplitudes were largest in response to pitch shifts in the natural voice, moderately large for non-voice complex stimuli and smallest for the pure tones. However, during passive listening, neural responses were equally large for pitch shifts in voice and non-voice complex stimuli but still larger than that for pure tones. Conclusions: These findings suggest that pitch change detection is facilitated for spectrally rich sounds such as natural human voice and non-voice complex stimuli compared with pure tones. Vocalization-induced increase in neural responses for voice feedback suggests that sensory processing of naturally-produced complex sounds such as human voice is enhanced by means of motor-driven mechanisms (e.g. efference copies) during vocal production. Significance: This enhancement may enable the audio-vocal system to more effectively detect and correct for vocal errors in the feedback of natural human vocalizations to maintain an intended vocal output for speaking.

Original languageEnglish (US)
Pages (from-to)2408-2417
Number of pages10
JournalClinical Neurophysiology
Volume122
Issue number12
DOIs
StatePublished - Dec 1 2011

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Keywords

  • Acoustical complexity
  • Efference copies
  • Event-related potentials (ERPs)
  • Internal forward model
  • Pitch shift stimulus
  • Self-vocalization

ASJC Scopus subject areas

  • Sensory Systems
  • Neurology
  • Clinical Neurology
  • Physiology (medical)

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