Analysis of the Symmetry of Electrodes for Electropalatography with Cone Beam CT Scanning

  • Jo Verhoeven
  • Naomi Rachel Miller
  • Constantino Carlos Reyes-AldasoroEmail author
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 894)


The process of compression of air and vibration of activity in the larynx through which speech is produced is of great interest in phonetics, phonology and psychology and is related to various areas of biomedical engineering as it has a strong relationship with cochlear implants, Parkinson’s disease and stroke. One technique by means of which speech production is analysed is the use of electropalatography, in which an artificial palate, moulded to the speakers’ hard palate is introduced in the mouth. The palate contains a series of electrodes, which monitor contact between the tongue and the palate during speech production. There is interest in the symmetry or asymmetry of the movement of the tongue as this may be related to languages or right- or left-handedness, however; this has never been thoroughly studied. A specific limitation of electropalatography for symmetry studies is that palates are hand-crafted and the position of the electrodes themselves may be asymmetric. In this work, we analyse the positioning of electrodes of one electropalatography setting. The symmetry was analysed by locating the electrodes of the palate through the observation of the palate with Computed Tomography. An algorithm to segment the electrodes and find the symmetry of left and right sides of the palates is described. No significant asymmetry was found for one specific palate. The methodology presented should allow the analysis of palates to be used in larger studies of speech production.


Computed tomography Segmentation Speech Production Electropalatography 



This work was funded by the Leverhulme Trust, Research Project Grant RPG-2017-054.


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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Jo Verhoeven
    • 1
    • 3
  • Naomi Rachel Miller
    • 1
  • Constantino Carlos Reyes-Aldasoro
    • 2
    Email author
  1. 1.Phonetics Laboratory, School of Health Sciences, Division of Language and Communication ScienceCity, University of LondonLondonUK
  2. 2.Department of Electrical Engineering, Research Centre in Biomedical Engineering, School of Mathematics, Computer Science and EngineeringCity, University of LondonLondonUK
  3. 3.Department of Linguistics & CLIPSUniversity of AntwerpAntwerpBelgium

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