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The influence of bistable auditory feedback on speech motor control
Takashi Mitsuya1, K G Munhall2
1Department of Speech and Hearing Sciences, University of Washington, 1417 NE 42nd Street, Seattle, WA, 98105-6246, USA.
Experimental Brain Research
|October 5, 2019
Summary
Speech production accuracy relies on auditory feedback. Linguistic sounds are corrected, while non-linguistic sounds are amplified when feedback is altered, showing stable representations guide speech control.
Area of Science:
- Speech production
- Auditory feedback processing
- Linguistic perception
Background:
- Auditory feedback is crucial for precise speech production.
- Speakers naturally correct articulation when auditory feedback is perturbed.
- This corrective behavior suggests sound categories influence speech control.
Purpose of the Study:
- To investigate how linguistic status affects the control of sound production.
- To determine if sounds lacking stable representations are controlled differently.
Main Methods:
- Participants produced a bistable sound (vowel or buzz) under instruction.
- Auditory feedback was perturbed during sound production.
- Acoustic changes in response to perturbation were measured.
Main Results:
- Linguistic target producers showed error-reducing behavior, similar to vowel production.
- Non-linguistic target producers exhibited error-amplifying behavior.
- Error amplification occurred even when participants consciously attempted correction.
Conclusions:
- Stable mental representations differentiate auditory feedback organization.
- Access to a linguistic category fundamentally alters speech production control.
- This highlights the role of perceptual organization in auditory-motor integration.
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