Abstract
The purpose of this paper is to propose an appropriate sensor arrangement of magnetometer sensing system for monitoring tongue point movements during speech. The system consists of a small permanent magnetic rod which is fixed on the tongue surface, and magnetometer sensors with two amorphous alloy cores. On the detection of the magnet's positions in the magnetic sensing system, tilting and lateral movements of the magnetic rod on the tongue cause errors which are serious problems on measuring articulatory movements.
Several sensor arrangements were studied to reduce these errors by means of computer simulation. Experimental results showed that the errors can be effectively reduced by setting four sensors at each side of the jaw where the sensors detect positions and inclination angles of the magnetic rod. Experiments based on the simulation were also done on one point of the tongue surface, and characteristic patterns on the tongue articulatory movements were observed during several speech sounds.
