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Incomplete compensation to articulatory perturbation
1Ecole d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Canada.
The Journal of the Acoustical Society of America
|March 1, 1995
Summary
Speech adaptation to jaw opening is not immediate or complete. French speakers show developing compensatory strategies over time, especially for vowels, while consonants require longer speech adaptation.
Area of Science:
- Speech Science
- Acoustic Phonetics
- Biomechanics of Speech
Background:
- Understanding speech adaptation is crucial for audiology and speech-language pathology.
- Jaw opening affects speech acoustics, but compensatory mechanisms are not fully understood.
Purpose of the Study:
- To investigate immediate and long-term acoustic compensation for increased jaw opening during speech.
- To examine differences in adaptation for vowels and consonants in French speakers.
Main Methods:
- Acoustic analysis of vowels, fricatives, and stop consonants produced by 15 French speakers.
- Speech recordings under free-mandible and two fixed-mandible (bite-block) conditions.
- Measurements taken immediately after bite-block insertion and after a 15-minute accommodation period.
Main Results:
- Small but significant acoustic differences were observed between bite-block and normal conditions.
- Compensation for increased jaw opening was neither immediate nor complete.
- Vowels showed potential for developing error-based compensatory strategies over time.
- Consonants required a longer adaptation period, possibly due to articulatory complexity.
Conclusions:
- Speech adaptation to altered jaw mechanics is a gradual process.
- Vowel and consonant production may employ different temporal adaptation strategies.
- Individual variability exists in speech compensatory abilities.