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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 1.

Figure 1

The measurement of vocal tract length (VTL) defined as the curvilinear distance along the midline of the tract starting at the thyroid notch to the intersection with a line drawn tangentially to the lips. Left panel is the midsaggital MRI of pediatric male subject at age 4 years, 4-months with VTL measuring 11.28 cm. Right panel is the midsaggital MRI of adult male subject at age 54 years 2 months with VTL measuring15.87 cm.