Revision as of 16:48, 28 March 2015 by WikiSysop (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

A vowel sound is one in which the vocal tract is open and the flow of air is unobstructed. In English as well as in pinyin, vowel sounds are normally written with the letters "a", "e", "i", "o", "u", "w", and "y." Pinyin also includes the vowel "ü".

Sources and further reading