This study first examined the accuracy of pressure-flow area estimates of experimental openings in anterior palatal obturators of three adult subjects. Second, we evaluated pressure-flow measures of the same experimental openings using a model. Results indicated that percent error in orifice estimates was slightly higher for induced openings in human subjects (13%) versus those in the model (11%). Results for our human subjects were similar to those reported by previous investigators.
AndreassenM.L., SmithB.E., GuyetteT.W.Pressure-flow measurements for selected oral and nasal sound segments produced by normal adults.Cleft Palate Craniofac J1992; 29: 1–9.
2.
BernthalJ.E., BeukelmanD.R.The effect of changes in velopharyngeal orifice area on vowel intensity.Cleft Palate J1977; 14: 63–77.
3.
GuyetteT.W., CarpenterM.A.Accuracy of pressure-flow estimates of velopharyngeal orifice size in an analog model and human subjects.J Speech Hear Res1988; 31: 537–548.
4.
GuyetteT.W., SmithB.E.Partitioning nasal airway resistance in normal adults.Am J Rhinol1992; 6: 93–100.
5.
LubkerJ.L.Velopharyngeal orifice area: a replication of analog experimentation.J Speech Hear Res1969; 12: 218–222.
6.
PallanchJ.F., McCaffreyT.V., KernE.B.Normal nasal resistance.Otolarlyngol Head Neck Surg1985; 93: 778–785.
7.
SmithB.E., KostinskiA.B.Prediction of modeled palatopharyngeal port openings under conditions simulating pharyngeal flap reconstruction.Cleft Palate J1985; 23: 154–156.
8.
SmithB.E., MaddoxC.M., KostinskiA.B.Modeled velopharyngeal orifice area prediction during simulated stop consonant production in the presence of increased nasal airway resistance.Cleft Palate J1985; 22: 149–153.
9.
SmithB.E., MoonJ.B., WeinbergB.The effects of increased nasal airway resistance on modeled velopharyngeal orifice area estimation.Cleft Palate J1984; 21: 172–180.
10.
SmithB.E., WeinbergB.Prediction of velopharyngeal orifice area: a re-examination of model experimentation.Cleft Palate J1980; 17: 277–282.
11.
SmithB.E., WeinbergB.Prediction of modeled velopharyngeal orifice areas during steady flow conditions and during aerodynamic simulation of voiceless stop consonants.Cleft Palate J1982; 19: 172–180.
12.
SmithB.E., WeinbergB.Velopharyngeal orifice area prediction during aerodynamic simulation of fricative consonants.Cleft Palate J1983; 20: 1–6.
WarrenD.W., DevereuxJ.L.An analog study of cleft palate speech.Cleft Palate J1966; 3: 104–114.
15.
WarrenD.W., DuBoisA.B.A pressure-flow technique for assessing velopharyngeal orifice area during continuous speech.Cleft Palate J1964; 1: 52–71.
16.
YatesC.C., McWilliamsB.J., VallinoL.D.The pressure-flow method: Some fundamental concepts.Cleft Palate J1990; 27: 193–198.
17.
ZajacD.J., YatesC.C.Accuracy of the pressure-flow method in estimating induced velopharyngeal orifice area; effects of the flow coefficient.J Speech Hear Res1991; 34: 1073–1078.
