A) A sagittal view of the placement and shape of a pseudopalate used to perturb the topography of articulation. Reprinted with permission from: Baum, S. R., & McFarland, D. H. (1997). The development of speech adaptation to an artificial palate. Journal of the Acoustical Society of America, 102, 2353–2359. Copyright 1997, Acoustical Society of America.
B) A dental appliance used to perturb the production of /s/. The left panel shows the upper and lower teeth; the right panel shows a sagittal view depicting the effective lengthening of the lingual surface of the upper central incisors. Reprinted with permission from: Jones, J. A., & Munhall, K. G. (2003). Learning to produce speech with an altered vocal tract: The role of auditory feedback. Journal of the Acoustical Society of America, 113, 532–543. Copyright 2003, Acoustical Society of America.