Abstract
The influence of changes in the transglottal pressure on the fundamental frequency of phonation (F0) has been determined by several investigators. In this study, attention was focused on the effect of small transglottal pressure changes, 2cm H2O or less, upon F0, which had not closely investigated in previous reports. A 45-year-old male who had no laryngeal, pulmonary and articulatory disorders served as the subject. A nearly linear relationship (-8Hz per cm H2O) was found between the pressure and F0 at 138 Hz, 161Hz and 176Hz. At 232Hz and 276Hz, a linear relationship (-11Hz per cm H2O) was observed when the pressure change was greater than 0.5cm H2O. For small pressure changes, the relationship was inconsistent. At 190Hz, no consistent relationship was observed between the pressure and F0. The results suggest that the relationship between the transglottal pressure and F0 depends on the state of laryngeal adjustment.
