Shaw N, Gilbert H R
J Speech Hear Res. 1982 Sep;25(3):476-80. doi: 10.1044/jshr.2503.476.
Respirometric quotients, indices of velopharyngeal closure, were determined from oral and nasal air volumes measured separately but simultaneously. Ten children aged 6-10 years were the subjects. The quotients were significantly lower for speech stimuli involving nasal sounds than for those involving nonnasal sounds. In contrast to the quotients obtained in previous research with children, the quotients obtained in this study were close to, but not in excess of, unity.
呼吸商，即腭咽闭合指数，是通过分别但同时测量口腔和鼻腔气量来确定的。十名6至10岁的儿童作为研究对象。涉及鼻音的语音刺激的呼吸商显著低于涉及非鼻音的语音刺激。与之前对儿童的研究中获得的呼吸商相比，本研究中获得的呼吸商接近但不超过1。
