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Laryngeal muscles and articulatory control
The Journal of the Acoustical Society of America
|September 1, 1984
Summary
This study investigated laryngeal muscle activity during Swedish voiceless consonants. Findings show specific muscles control articulation and phonation, crucial for speech production.
Area of Science:
- Speech Science
- Laryngeal Physiology
- Articulatory Phonetics
Background:
- Previous research explored laryngeal control in speech.
- Focus on Swedish voiceless consonants and consonant clusters is limited.
- Understanding intrinsic laryngeal muscle function is key to speech production.
Purpose of the Study:
- To examine the roles of four intrinsic laryngeal muscles in controlling Swedish voiceless consonants.
- To differentiate muscle involvement in articulation versus phonation (F0).
- To investigate muscle activity during consonant clusters.
Main Methods:
- Electromyographic (EMG) recordings from four intrinsic laryngeal muscles.
- Simultaneous transillumination and acoustic signal analysis.
- Analysis of muscle activity patterns during speech tasks involving voiceless consonants and clusters.
Main Results:
- Vocalis and lateral cricoarytenoid muscles are involved in both articulation and phonation (F0).
- Interarytenoid muscle activity is primarily linked to articulatory adjustments.
- Cricothyroid muscle activity correlates with F0 changes and increases for voiceless sounds.
- Vocalis muscle contributes to glottal adduction without complete closure in voiceless clusters.
Conclusions:
- Specific intrinsic laryngeal muscles have distinct roles in speech production, differentiating between articulation and phonation.
- Laryngeal muscle coordination, including the vocalis, lateral cricoarytenoid, and interarytenoid, is essential for producing voiceless consonants and clusters.
- Future research should consider laryngeal behavior within a broader systems framework for motor control in speech.
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