Vibrato is caused when the air flow exceeds the resistance of the folds. The Hagen-Poiseuille Law references that when the airflow becomes greater than the resistance of the conduit, laminar flow is terminated and turbulent flow begins. The trachea terminates as a conduit when the vocal folds come into play. Please understand there is a difference in the definition of the gas law and the physiologic application of the gas law.So much for not using vibrato in baroque music, huh? Vibrato is not just a good idea. Like gravity, it's the law.
Wednesday, November 25, 2009
Vibrato, not just a good idea
From a post on the Vocalist by David Kastrup: