Vocal Fold Damping during Sustained Vowel Productions

R Netsell, T Will, K Bakker


A flow-interruption procedure was used to dampen vocal fold oscillations during sustained vowel productions.  Oscillation threshold pressure (OTP) was estimated by the level of intraoral air pressure at the moment of complete vocal fold damping.  OTP was significantly higher during [i] than [ɑ] or [ʌ] productions.  Explanations for OTP differences between the vowels were explored.  It was tentatively concluded that OTP may provide an indirect and noninvasive measure of vocal fold stiffness.