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Legend: unrounded • rounded |
A close vowel, also known as a high vowel (in U.S. terminology[1]), is any in a class of vowel sounds used in many spoken languages. The defining characteristic of a close vowel is that the tongue is positioned approximately as close as possible to the roof of the mouth as it can be without creating a constriction. A constriction would produce a sound that would be classified as a consonant.
The term "close" /ˈkloʊs/ is recommended by the International Phonetic Association. Close vowels are often referred to as "high" vowels, as in the Americanist phonetic tradition, because the tongue is positioned high in the mouth during articulation.[2]
In the context of the phonology of any particular language, a high vowel can be any vowel that is more close than a mid vowel. That is, close-mid vowels, near-close vowels, and close vowels can all be considered high vowels.