Abstract
We have been developing the pronunciation training system, in which visual instruction about the correct articulation are shown. These instructions are produced based on the formants of speech signal and show the shape of articulator to the learners. They work effectively, but more comprehensible instruction on how to move the articulator is required. We think that the facial muscles that move the articulator are useful to such the instruction. In this report, we attempt to construct lips movement model representing the relationship between the facial muscles activity and the lips movement and discuss the application of this model to pronunciation training.
