舌面元音
shé miàn yuán yīn
- 名dorsal vowel
舌面元音-
该婴儿的语音发展从39日龄自控音出现到13月龄沉默期可分4个阶段：第一阶段有各类舌面元音和舌面中、舌面后辅音；
The development of the infant 's speech sound can be divided into four stages , from articulation of self-controlled sound at the age of 39 days old to the age of 13 months old . The first stage embodies palatal vowels and central palatal and back palatal consonants .