A 3D biomechanical vocal tract model to study speech production control: How to take into account the gravity?

Stéphanie Buchaillard (1) , Pascal Perrier (1) , Yohan Payan (2)

1 ICP - Institut de la communication parlée
2 TIMC-IMAG-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur

This paper presents a modeling study of the way speech motor control can deal with gravity to achieve steady-state tongue positions. It is based on simulations carried out with the 3D biomechanical tongue model developed at ICP, which is now controlled with the Lambda model (Equilibrium-Point Hypothesis). The influence of short-delay orosensory feedback on posture stability is assessed by testing different muscle force/muscle length relationships (Invariant Characteristics). Muscle activation patterns necessary to maintain the tongue in a schwa position are proposed, and the relations of head position, tongue shape and muscle activations are analyzed.

Mots clés: speech production; biomechanical model; tongue

Domaines: Biomécanique [physics.med-ph]; Biomécanique [physics.med-ph]

Stéphanie Buchaillard, Pascal Perrier, Yohan Payan. A 3D biomechanical vocal tract model to study speech production control: How to take into account the gravity?. 2006, pp.403-410. ⟨hal-00126320⟩