Abstract
Most studies of speech articulation are limited to a single plane, typically the midsagittal plane, although coronal planes are also used. Single-plane data have been undeniably useful in improving our understanding of speech production, but for many acoustic and aerodynamic processes, a knowledge of 3D vocal tract shapes is essential. In this study, we used palate impressions to investigate variations in the 3D structure of the palates of several individuals, and we used real-time 3D ultrasound to image the tongue surface during sibilant production by the same individuals. Our analysis focused on the degree to which tongue shapes during sibilant productions are substantially similar or different between individuals with different palate shapes and sizes.
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