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    A common co-ordinate system for mid-sagittal articulatory measurement

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    eResearch%203597.pdf (364.3Kb)
    Date
    2011-06
    Author
    Scobbie, James M.
    Lawson, Eleanor
    Cowen, Steve
    Cleland, Joanne
    Wrench, Alan A.
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    Citation
    Scobbie, J., Lawson, E., Cowen, S., Cleland, J. & Wrench, A. (2011) A common co-ordinate system for mid-sagittal articulatory measurement, QMU CASL Working Papers WP-20, , , ,
    Abstract
    A standard practice in EMA articulatory measurement is to set the origin of the measurement space near the boundary of the upper incisors and gum, on a standard reference coil. A conventional horizontal dimension is defined as being parallel to the speaker's unique bite (occlusal) plane. We propose that this convention be extended to other instrumentation, with a focus on how it can be achieved for ultrasound tongue imaging (UTI) in particular, using a disposable and hygienic vacuum-formed bite plate of known size. A bite plane trace, like a palate trace, provides a consistent reference to allow images to be rotated and translated in case the probe is in a new location relative to a speaker's cranial space. The bite plane also allows speakers with differently shaped palates to be overlaid, and for ultrasound data to share a coordinate space with EMA. We illustrate the proposal using a sample of six speakers. The average bite plane slope could be used to retrospectively rotate ultrasound data that lacks bite-plane measurement
    URI
    https://eresearch.qmu.ac.uk/handle/20.500.12289/3597
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