Non-pulmonic initiation in human beatboxing: a real-time MRI study
Résumé
Human Beatboxing (HBB) is a musical technique produced by vocal tract movements. Beatboxers seem to exploit vocal tract capacities to their full extent. Thus, HBB is a good paradigm to study production mechanisms. This study uses aerodynamic and laryngoscopic along with 2D MRI data to analyze non-pulmonic initiation mechanisms during HBB production. The production of 4 professional beatboxers was analyzed while producing glottalic and lingual mechanisms. Results shows that glottalic mechanisms result from a sequence of laryngeal vertical movement, tongue root maneuvers and, sometimes, additional pharyngeal gestures to increase or decrease pressure. Lingual mechanisms were produced by front-back tongue movements to generate egressive or ingressive airflows. A reformulation of Catford model of initiation mechanisms, in terms of initiatory gestures rather than aerodynamic parameters, is proposed.
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