A cineradiograhic study of static and dynamic aspects of American English /r/.
Zawadzki P A, Kuehn D P·Phonetica
High speed cineradiograms were used to examine the articulatory characteristics associated with selected allophones of American English /r/. Only one of the three speakers produced a 'retroflexed' /r/ with a raised tongue apex. The other speakers produced a 'bunched' /r/ characterized by a raising of the tongue dorsum.…