Second International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2001)
Transglottal pressure affects fundamental frequency of phonation (Fo). When we plot Fo-change per unit change of transglottal pressure (dF/dP) as function of Fo, the values for dF/dP showed a non-linear or V-shaped relationship against Fo. In this study, we calculated the values for dF/dP with a rubber model under various condition of length and weight of the vibrating part, aiming to reproduce a similar relationship between dF/dP and Fo that has been observed in humans. The results showed that an increase in the length decreased dF/dP, and increased Fo. An increase in the weight decreased dF/dP, and decreased Fo as well. Using selected data, we were able to reproduce a V-shaped relationship between dF/dP and Fo, which is similar to that observed in humans. Based on the results, we speculate that, in humans, length-change of the vocal folds determines Fo at a lower Fo, and weight-change determines Fo at a higher Fo.
Index Terms. fundamental frequency of phonation, model experiment, transglottal pressure
Bibliographic reference. Kitajima, Kazutomo / Kataoka, Hideyuki / Owaki, Shigehiro (2001): "Effects of transglottal pressure on fundamental frequency of phonation: study with a rubber model", In MAVEBA-2001, 21-26.