Bernthal J E, Beukelman D R
Cleft Palate J. 1977 Jan;14(1):63-77.
This investigation studied the influence of changes in velopharyngeal orifice size on vowel intensity in normal speakers when subglottal air pressure was controlled. Controlled variations in velopharyngeal orifice area were achieved by two different methods. The effective velopharyngeal orifice areas introduced into the subjects were verified aerodynamically. A reduction in vowel intensity (SPL) was recorded during the large experimental velopharyngela orifice condition (50 mm2) when compared to a control condition. The clinical implications of these findings are discussed.
本研究探讨了在控制声门下气压时，正常受试者腭咽口大小变化对元音强度的影响。通过两种不同方法实现了腭咽口面积的可控变化。通过空气动力学方法验证了引入受试者的有效腭咽口面积。与对照条件相比，在实验性腭咽口较大（50平方毫米）的情况下，记录到元音强度（声压级）降低。讨论了这些发现的临床意义。
