In this paper the latest prototype Optopalatograph (OPG) is described and its operation is demonstrated graphically and in comparison to theoretical predictions. The system is divided into three parts - the optopalate itself; a separate self contained unit composed of 16 switched infra-red light sources, associated control logic and 16 receivers; and a computer with A/D card running software to analyse and interpret graphically the sensor outputs. The current prototype measures distances of up to 20mm between all of the 16 pre-selected points on the hard palate and the surface of the tongue at a frame rate of 100Hz. We conclude that the new prototype provides a practical measurement system with a subjectively informative real-time display but further development is required in order to obtain objective accuracy.
Cite as: Wrench, A.A., McIntosh, A.D., Watson, C., Hardcastle, W.J. (1998) Optopalatograph: real-time feedback of tongue movement in 3D. Proc. 5th International Conference on Spoken Language Processing (ICSLP 1998), paper 1117, doi: 10.21437/ICSLP.1998-369
@inproceedings{wrench98_icslp,
author={Alan A. Wrench and Alan D. McIntosh and Colin Watson and William J. Hardcastle},
title={{Optopalatograph: real-time feedback of tongue movement in 3D}},
year=1998,
booktitle={Proc. 5th International Conference on Spoken Language Processing (ICSLP 1998)},
pages={paper 1117},
doi={10.21437/ICSLP.1998-369}
}