Table 1.

Mean F1 and F2 frequencies (hertz) for each subject shown for each vowel and head orientation

VowelOrientationSubject 1Subject 2Subject 3Subject 4Subject 5Subject 6
F1F2F1F2F1F2F1F2F1F2F1F2
AUpright915.41926.5703.91535.3821.31568.8854.01555.6675.01502.8799.71625.5
(7.38)(16.16)(5.76)(7.24)(13.04)(9.93)(12.03)(7.35)(5.69)(13.12)(6.51)(14.03)
Supine855.11991.6688.11547.8796.11664.7821.91551.4692.01462.8751.01632.1
(7.59)(16.44)(3.65)(7.33)(11.79)(9.65)(8.74)(7.42)(6.25)(11.42)(6.16)(11.00)
Prone875.82070.6645.71556.2757.41646.0809.31572.6681.41506.2662.21656.8
(10.69)(24.08)(2.98)(5.63)(9.84)(14.52)(13.44)(9.37)(7.62)(8.31)(8.34)(11.92)
EUpright712.12105.6599.91653.6642.11790.3619.01736.9560.41502.4634.01922.5
(5.28)(24.33)(8.36)(11.35)(8.16)(7.52)(10.49)(7.16)(5.09)(10.16)(6.13)(19.54)
Supine700.02117.3583.01620.8649.41847.3617.31772.6556.11505.8590.01941.5
(4.26)(28.72)(6.32)(8.63)(9.90)(10.09)(8.88)(7.36)(6.01)(11.67)(4.50)(24.61)
Prone695.42184.1554.01663.4592.81849.9602.31786.2538.61539.7510.01846.4
(4.33)(25.41)(5.48)(11.26)(8.00)(10.27)(12.52)(9.45)(5.38)(11.78)(8.07)(23.26)
  • SE is shown in parentheses. Subject 1 is female; the remainder are male.