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

Barcelona, Spain
August 3-9, 2003

Beyond 2D in Articulatory Data Acquisition and Analysis

Philip Hoole (1), Andreas Zierdt (1), Christian Geng (2)

(1) Ludwig-Maximilians-Universität München, Germany
(2) Zentrum fur Allgemeine Sprachwissenschaft, Germany

The potential of the extension of traditional EMMA recordings to 5D in a new articulographic system is illustrated. "5D" means that each sensor delivers three translational and two rotational coordinates. This high information density gives the following advantages: lateral tongue movements are a source of information rather than error; subject's head does not need to be fixed relative to the apparatus; the six degrees of freedom of rigid structures can be efficiently captured; rotational information provides additional constraints on the possible shape of deformable structures such as the tongue. Regarding analysis, we discuss the use of 3-way statistical models in recent developments of the PARAFAC tradition, specifically considering the application to multispeaker 3D tongue surface data from MRI scans, an area that presents an interesting and largely unexplored challenge to these models. In addition, a new algorithm for deriving tongue surfaces through efficient merging of axial and coronal scans is presented.

Full Paper

Bibliographic reference.  Hoole, Philip / Zierdt, Andreas / Geng, Christian (2003): "Beyond 2d in articulatory data acquisition and analysis", In ICPhS-15, 265-268.