Abstract
The effects of transglottal pressure on fundamental frequency of phonation (dF/dP) were investigated by loading a sudden transglottal pressure change during sustained phonation.
1) Human experiments
Fourteen human subjects participated. The results showed that the values of dF/dP within the modal register were smallest around 200 Hz in males, and 250-400Hz in females and children. The values of dF/dP as a function of F0 varied following a V-shaped pattern, indicating that the role of transglottal pressure on F0 was not only important in low modal register, but also in high modal register.
2) Dog experiments
Five dogs were involved. The forced phonation under simulated activities of cricoarytenoid (CT) muscles and thyroarytenoid (TA) muscles showed that the CT muscle activities have the strongest effects on the V-shaped pattern.
Human and dog experiments revealed the definite role of transglottal pressure for regulation of F0 in high modal register.
