Acoustic correlates of nasopharyngeal resonance
Marios S. Fourakis, Heather B. Karlsson, Christie M. Tilkens, Lawrence D. Shriberg · ExLing Conferences · 2010
Measurements of F1 and F2 were made for the four corner vowels produced by typically-developing adolescents and adolescents with Fragile X and Down syndromes. The two high vowels were produced with lower F2 frequencies by the Fragile X and Down syndrome groups than the group of typically developing persons. This is consistent with a hypothesized backing of the tongue.