Analyse électromyographique de la production des plosives labiales : enjeux méthodologiques

Thibault Cattelain 1 Maëva Garnier 1 Christophe Savariaux 2, 3 Silvain Gerber 2 Pascal Perrier 1
1 GIPSA-PCMD - PCMD
GIPSA-DPC - Département Parole et Cognition
2 GIPSA-Services - GIPSA-Services
GIPSA-lab - Grenoble Images Parole Signal Automatique
3 GIPSA-CRISSP - CRISSP
GIPSA-DPC - Département Parole et Cognition
Abstract : Our goal is to show the interest of distinguishing several phases in the gesture underlying the production of labial consonants, including during the occlusion, where lips are essentially static, in order to better understand their control. Four adult speakers were recorded, while producing logatoms including the consonants /p/ and /b/, followed by 3 vowels (/a/, /i/ or /u/) and with increasing levels of articulatory effort. Five surface EMG signals targeting five orofacial muscles involved in several lip movements were recorded simultaneously with a video of the lips. The speech gestures were segmented into four phases, based on the interlabial distance. Similar muscle activation patterns were observed for the four speakers, regardless of the consonant (/p/ or /b/) and the vowel context. Finally, the activities of the lower lip depressor and the mentalis muscles in some movement phases appear to be reliable descriptors of articulatory effort.
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Thibault Cattelain, Maëva Garnier, Christophe Savariaux, Silvain Gerber, Pascal Perrier. Analyse électromyographique de la production des plosives labiales : enjeux méthodologiques. Journées d'Etude de la Parole, Jun 2018, Aix en Provence, France. ⟨hal-01867567⟩

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