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. Author manuscript; available in PMC: 2008 Dec 9.
Published in final edited form as: J Speech Lang Hear Res. 2007 Dec;50(6):1510–1545. doi: 10.1044/1092-4388(2007/104)

Figure 12.

Figure 12

A composite display of the male, female and children's average F1, F2 and F3 values across studies for the four corner vowels across age. The formant averages are the same as those displayed in the vowel quadrilaterals in Figures 2 to 7.