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Compensation to articulatory perturbation: perceptual data
S R Baum1, D H McFarland, M Diab
1School of Communication Sciences & Disorders, McGill University, Montréal, Québec, Canada. INSR@MUSICB.MCGILL.CA
The Journal of the Acoustical Society of America
|June 1, 1996
Summary
Articulatory perturbation affects speech sound perception. Listeners identified fewer vowels and consonants and rated their quality lower when produced with a bite block, impacting speech intelligibility.
Area of Science:
- Speech Science
- Phonetics
- Auditory Perception
Background:
- Previous acoustic analyses revealed spectral changes in vowels and consonants under bite-block conditions.
- Adaptation effects for vowels suggested time-dependent compensation, while consonants might need longer adaptation periods.
Purpose of the Study:
- To investigate the perceptual salience of acoustic differences in speech sounds produced with articulatory perturbation.
- To compare perceptual data with previous acoustic findings.
Main Methods:
- Ten listeners participated in identification and quality rating tasks.
- Stimuli were speech sounds (vowels, stop consonants, fricatives) produced under normal and bite-block conditions (immediate compensation and postconversation).
Main Results:
- Reduced identification scores and quality ratings were observed for some vowels and consonants in the bite-block condition (immediate compensation).
- Fricative quality ratings remained lower in the bite-block condition (postconversation) compared to normal conditions.
Conclusions:
- Acoustic changes due to articulatory perturbation are perceptually significant, affecting speech intelligibility.
- The perceptual impact varies across speech sound types and adaptation conditions.