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About this paper
Sam Kirkham, Patrycja Strycharczuk
This study validates ultrasound tongue imaging as a reliable source for estimating dynamical articulatory model parameters by comparing it with electromagnetic articulography (EMA). It reveals that ultrasound yields comparable stiffness and damping parameters to EMA, though systematic and explainable differences are observed in target position estimates, particularly for the tongue dorsum and jaw.
Key insights
- Ultrasound-derived stiffness (k) and damping (b) parameters for tongue dorsum and jaw movements are statistically comparable to those obtained from EMA, with 95% credible intervals for mean differences consistently crossing zero.
- Systematic differences in estimated target positions (T) exist between ultrasound and EMA for some articulatory dimensions, specifically for TDx, JAWx, and JAWy, which can be attributed to the specific anatomical points tracked and probe stabilization effects.
- The simple linear harmonic oscillator model provides a good fit (R² ">= 0.9) for kinematic data from both ultrasound and EMA, indicating its utility for baseline comparisons in dynamical modeling.
Summary by alphaXiv.
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