Exploration conjointe sur l'humain («in vivo») et sur maquette («in vitro») de l'interaction entre les cordes vocales et les bandes ventriculaires

National audienceIn speech and singing, it is common to observe a vibration of ventricular bands accompanying the vocal-folds vibratory movement. In this paper, we aim to explore this interaction both “in vivo” on a singer using electroglottography and high-speed cinematography, and “in vitro” on a repliqua of self-oscillating vocal-folds and rigid ventricular bands using a simplified aerodynamical model for laryngeal airflow coupled to a two-mass model for vocal-folds vibratory motion. The in vitro results show that, depending on the geometry, the presence of a constriction above the glottis can either alter or favour the glottal vibration, in line with theoretical modelling. In vivo, the alteration of glottal vibration has been observed during each phase of ventricular-bands contact