Mandibular rotation and translation during speech
Jan Edwards, Katherine Safford Harris · The Journal of the Acoustical Society of America · 1986
Jaw movement during speech has typically been represented as the movement of a single point even though this representation does not provide adequate information to predict the position of other points on the jaw. However, since the tongue rests on the jaw, such information is needed in order to calculate the jaw component of tongue position for different points on the tongue. In this experiment, a two-dimensional rigid-body model of jaw movement was developed to describe speech-related jaw opening and closing gestures. Jaw movements were decomposed into three components: rotation about the terminal hinge axis and the horizontal and vertical translation of that axis. Data were collected for three subjects during two separate recording sessions. The two-dimensional, rigid-body model of jaw movement appeared to provide useful information on the control of jaw movement. Furthermore, it proved robust enough to preserve inter-speaker differences across the two separate recording sessions. [Work supported by NINCDS grant NS-13617 to Haskins Laboratories.]