Speed rate effects on human beatboxing: an aerodynamic study
Résumé
The present study aims to describe speed rate effects (i.e. tempo) on Human Beatboxing based on aerodynamic data. Intraoral pressure (Po), oral airflow (Oaf), nasal airflow (Naf) and the acoustic signal were simultaneously recorded. The experiment consisted in the production of various Beat Patterns composed of kick drums, hi-hats and snare drums. They were produced at different rates: 90 beats per minute (BPM), 120 BPM and 150 BPM. Based on Po and Oaf, we estimated the relative constriction area. Results show temporal reduction of patterns (ρ = −0.97) and sounds (ρ = −0.37). Subjects tended to decrease intraoral pressure and increase constriction area as speed rate increased. In few cases, subjects increased intraoral pressure and decreased constriction area as rate increased. Human Beatboxing constitute an original contribution to discuss production mechanisms with non-linguistic data.
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