EXPERIMENTAL AND COMPUTER MODELLING STUDY OF GLOTTAL CLOSING VELOCITY DURING PHONATION

This preliminary study shows that the impact stress between the colliding vocal folds during phonation should not be evaluated from the maximum velocity of the glottal closing because the velocity of the closing diminishes just before the glottal closure. This phenomenon, which can be caused by a pressure cushion effect in the fast narrowing glottal gap, is demonstrated with measurements from high speed camera images recorded from human and on a physical laboratory model for vowel [u:] phonation and on a threemass computer model employing a Hertz model of impact force. For a more detailed future study of this phenomenon a faster camera has to be used.