抄録
The glottal efficiency defined by van den Berg was measured with two different techniques. 1. The glottal airway resistance and efficiency during vowel production were estimated using the Painters modified noninvasive method of the device of Smitheran and Hixon (1981). Five normal males were the subjects. Measurements were conducted when the subjects uttered sylabble /pa : / three times successivly. 2. By means of Nagashima PS-77-201, glottal efficiency was determined in 38 normal adults, 23 males and 15 females. Problems inherent to the two methods were discussed.
