Lips-Jaw and Tongue-Jaw Articulatory Tradeoff in DYNARTmo
This work addresses the problem of understanding articulatory synergy in speech production for researchers in phonetics and computational modeling, but it is incremental as it builds on existing models with simplified assumptions.
This paper tackled the problem of modeling articulatory tradeoffs between primary and secondary articulators, such as lips-jaw and tongue-jaw coordination, using the dynamic articulatory model DYNARTmo. The result showed that DYNARTmo reproduced empirically attested patterns like jaw-supported apical closures and tongue-jaw co-movement across various consonant-vowel combinations, demonstrating realistic spatio-temporal movement patterns.
This paper investigates how the dynamic articulatory model DYNARTmo accounts for articulatory tradeoffs between primary and secondary articulators, with a focus on lips-jaw and tongue-jaw coordination. While DYNARTmo does not implement full task-dynamic second-order biomechanics, it adopts first-order task-space gesture specifications comparable to those used in articulatory phonology and integrates a simplified mechanism for distributing articulatory effort across multiple articulators. We first outline the conceptual relationship between task dynamics and DYNARTmo, emphasizing the distinction between high-level task-space trajectories and their low-level articulatory execution. We then present simulation results for a set of CV syllables that illustrate how jaw displacement varies as a function of both place of articulation (labial, apical, dorsal) and vowel context (/a/, /i/, /u/). The model reproduces empirically attested patterns of articulatory synergy, including jaw-supported apical closures, lower-lip elevation in bilabial stops, tongue-jaw co-movement, and saturation effects in labial constrictions. These results demonstrate that even with computationally simplified assumptions, DYNARTmo can generate realistic spatio-temporal movement patterns that capture key aspects of articulatory tradeoff and synergy across a range of consonant-vowel combinations.