15th International Congress of Phonetic Sciences (ICPhS-15)

Barcelona, Spain
August 3-9, 2003

3D Laser Scanning of EPG Palates: Benefits of Using a 3D EPG Model in the Analysis of Tongue-to-Palate Contacts

Justine V. Goozee, Timothy D. McAleer, Dion H. Scott, Bruce E. Murdoch

University of Queensland, Australia

The present study describes a new method of generating 3D computer graphics models of the palate using a hand-held laser-scanning device, and investigates the advantages of the models in EPG analysis. Two speech-language pathologists (SLPs) examined a set of 2D EPG diagrams generated by a control speaker and three subjects with dysarthria. The SLPs judged whether there was an observable difference in the tongue-to-palate contacts and suggested possible reasons for any differences. After a three to five month interval, the SLPs were asked to reanalyse the contacts, which were this time displayed on 3D computer models of the subjects' palates generated using the laser-scanning device. Palate shape was considered, albeit inconsistently, as a possible factor influencing amount of tongue contact when the contacts were displayed in 3D, but not in 2D. The implications of the findings for future EPG analyses and treatment of dysarthric speech will be discussed.

Full Paper

Bibliographic reference.  Goozee, Justine V. / McAleer, Timothy D. / Scott, Dion H. / Murdoch, Bruce E. (2003): "3d laser scanning of EPG palates: benefits of using a 3d EPG model in the analysis of tongue-to-palate contacts", In ICPhS-15, 1655-1658.