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Time-dependent neural processing of auditory feedback during voice pitch error detection.

Roozbeh Behroozmand¹, Hanjun Liu, Charles R Larson

¹Northwestern University, Evanston, IL, USA.

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Summary

Neural processing of self-produced sounds is sensitive to timing. Delayed auditory feedback during vocalization amplifies neural responses, aiding voice control and error correction.

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Area of Science:

Neuroscience
Auditory Neuroscience
Motor Control

Background:

Neural responses to self-produced actions are suppressed compared to external stimuli.
Motor-induced sensory suppression is sensitive to timing delays.

Purpose of the Study:

Investigate time-dependent neural processing of auditory feedback in self-produced vocalizations.
Examine the impact of vocalization timing on neural responses to auditory feedback alterations.

Main Methods:

Recorded event-related potentials (ERPs) during active vocalization and passive listening.
Presented normal and pitch-shifted auditory feedback with random time delays.
Compared neural responses to auditory feedback during vocal onset versus delayed feedback.

Main Results:

Neural responses to delayed auditory feedback perturbations were significantly larger than to immediate feedback.
Active vocalization enhanced neural responsiveness to feedback alterations only for non-zero delays.
Neural processing of auditory feedback is sensitive to the timing between vocal motor commands and feedback.

Conclusions:

Timing-dependent neural processing is crucial for audio-vocal integration.
This system aids in monitoring and controlling voice structure via error detection and correction.
Understanding these mechanisms is key to audio-vocal feedback processing.