1. Copyright © American Speech-Language-Hearing Association
From: Vowel Acoustic Space Development in Children: A Synthesis of Acoustic and Anatomic Data
J Speech Lang Hear Res. 2007;50(6): doi: / (2007/104)
Legend:
Vowel quadrilateral areas (log scale of Hz squared/1000) of the average F1–F2 acoustic space per age group for males (M–blue), females (F–red), and children (C–green; as displayed in Figures 2, 3, and 4), with three distinct cubic polynomial regression fits per plot (males, females, and children).
Date of download: 10/23/2017
Copyright © American Speech-Language-Hearing Association