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Auditory Feedback Is Used for Adaptation and Compensation in Speech Timing
Robin Karlin1, Chris Naber1, Benjamin Parrell1,2
1Waisman Center, University of Wisconsin-Madison.
Summary
Speakers adapt vowel duration, not consonant duration, to real-time auditory feedback perturbations. This speech adaptation suggests a focus on proportional timing rather than absolute timing in speech production.
Area of Science:
- Speech production
- Auditory feedback
- Motor control
Background:
- Real-time altered auditory feedback influences speech control.
- It plays a role in both online feedback and feedforward control for future speech.
Purpose of the Study:
- To investigate speech adaptation to temporal perturbations.
- To examine how real-time auditory feedback affects speech timing.
Main Methods:
- Twenty native English speakers participated.
- Real-time auditory feedback perturbation was applied to speech.
- Participants produced phrases with manipulated consonant and vowel durations.
Main Results:
- Speakers lengthened vowels in response to shortening but did not adapt consonant durations.
- Vowel lengthening showed aftereffects during the washout phase.
- Consonant duration was adjusted proportionally within the syllable.
Conclusions:
- Speakers actively monitor proportional durations in speech.
- Temporal dynamics of speech planning units are updated based on feedback.
- Adaptation mechanisms extend beyond single speech segments.
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