Advanced tongue root

Advanced tongue root

Advanced tongue root, abbreviated ATR or +ATR, also called expanded, involves the expansion of the pharyngeal cavity by moving the base of the tongue forward, lowering the larynx, and otherwise expanding the walls of the pharynx during the pronunciation of a vowel. This may result in +ATR vowels being longer than −ATR vowels. The lowering of the larynx sometimes adds a breathy quality to the vowel.