A COMPARISON OF SUBGLOTTAL AND INTRAORAL PRESSURE MEASUREMENTS DURINGPHONATION

Intraoral pressure and subglottal pressure, derived from tracheal punc ture, were recorded with the electroglottographic signal for one norma l speaking male during phonation. The mean subglottal pressure for vow els was also estimated by interpolating the intraoral pressure from su rrounding /p/ occlusions. The pressure measurements were highly correl ated (r = 0.98) and there were small pressure value differences (on av erage <2%). The effects of varying speech rate and mode of phonation o n the pressure measurements are discussed. A decrease in pressure from the mean subglottal pressure for the open phase and an increase for t he closed phase was found during the glottal vibratory cycles.