TY - JOUR
T1 - Effects of voice harmonic complexity on ERP responses to pitch-shifted auditory feedback
AU - Behroozmand, Roozbeh
AU - Korzyukov, Oleg
AU - Larson, Charles R.
N1 - Funding Information:
This research was supported by a grant from NIH , Grant No. 1R01DC006243 .
PY - 2011/12
Y1 - 2011/12
N2 - 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.
AB - 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.
KW - Acoustical complexity
KW - Efference copies
KW - Event-related potentials (ERPs)
KW - Internal forward model
KW - Pitch shift stimulus
KW - Self-vocalization
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U2 - 10.1016/j.clinph.2011.04.019
DO - 10.1016/j.clinph.2011.04.019
M3 - Article
C2 - 21719346
AN - SCOPUS:80855143626
VL - 122
SP - 2408
EP - 2417
JO - Clinical Neurophysiology
JF - Clinical Neurophysiology
SN - 1388-2457
IS - 12
ER -