Figure 4
From: Biomechanics of sound production in high-pitched classical singing
Stereotypical glottal configurations in high-pitched operatic soprano singing. Two main strategies emerged: (A) glottal configuration I: phonation with incomplete vocal fold adduction, resulting in a posterior glottal gap during vibration (even in the “closed” phase); and (B) glottal configuration II: greatly increased adduction of the arytenoids, supported by medialization of the ventricular folds; (C) glottal opening profiles for all strategies—see supplementary materials S5 and S6 for details.
