Abstract: Pronunciation obstacle is one of the characteristics of hearing and speech disabled persons. As the main organ of pronunciation,tongue plays an important role in pronunciation training. If the pronunciation visualization is applied to rehabilitation training, this can make the hearing and speech disabled persons intuitively watch the change of the tongue in the process of pronunciation, which may promote the rehabilitation training. On the basis of tongue anatomical structure and movement characteristics, the common movements of tongue in pronunciation are realized after the establishment of three-dimensional tongue muscle model and the relevant data of the tongue Xray images and electropalatography. Using this kind of visualization technology, we can help correction and rehabilitation for the hearing and speech disabled persons.

Key words: pronunciation visualization, rehabilitation training, pronunciation obstacle, virtual tongue modeling, motion simulation