Fig. 1: Used with permission from Estill Voice International. TVF = True Vocal Folds; TVF Body/Cover = Configurations that modify the vibratory mode of the true vocal folds, commonly referred to as registers but are not pitch dependent in EVT; FVF = False Vocal Folds; AES = Aryepiglottic Sphincter, aka epilarynx or space above the vocal folds and between the epiglottis and arytenoids; Velum = Soft palate; Support Structures = muscles of the Head & Neck and Torso.Read More →