Third International Conference on Spoken Language Processing (ICSLP 94)
A magnetic sensing system has great advantages in data collection with safety, ease, and high accuracy of non-invasive and hazardless measurements of articulatory movements. In attempts to develop such a magnetic sensing system as to detect static magnetic field induced by a small magnetic rod on the tongue surface, serious problems with tilting and lateral movements of the tongue are encountered.
This paper presents design improvements of articulatory measuring system and proposes a useful arrangement of sensors to reduce the measurement errors due to troublesome movements of the magnetic rod. For this purpose, several arrangements of the sensors were studied by computer simulation. Experimental results showed that errors can be effectively reduced by setting four sensors at each side of a subject's mandible where the sensors detect positions and inclination angles of the magnetic rod. At preliminary experiments, characteristic patterns of tongue movements including inclination due to deformation of tongue surface were observed on several test words.
Bibliographic reference. Ogata, Kohichi / Sonoda, Yorinobu (1994): "A study of sensor arrangements for detecting movements and inclinations of tongue point during speech", In ICSLP-1994, 659-662.