Adduction – Voice Science

Vocal Fold Adduction is the closure of the vocal folds by the interarytenoids (IA) and the lateral cricoarytenoid (LCA) muscles. Adduction occurs between inhalation and exhalation and during phonation. Incomplete adduction can be used stylistically to produce a breathy tone. Incomplete adduction forming a posterior glottal chink, is also common in teenagers and may be extremely common in female singers of all ages according to recent research.