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The open central unrounded vowel, or low central unrounded vowel, is a type of vowel sound, used in many spoken languages. While the International Phonetic Alphabet officially has no dedicated letter for this sound between front and back , it is normally written . If precision is required, it can be specified by using diacritics, such as centralized or retracted , but this is not common. Acoustically, however, is an extra-low central vowel.〔Geoff Lindsey (2013) (The vowel space ), Speech Talk〕 It is more common to use plain for an open central vowel and, if needed, (officially ''near-open'' front vowel) for an open front vowel. Alternatively, Sinologists may use the letter (small capital A). The IPA voted against officially adopting this symbol in 2011–2012. The Hamont dialect of Limburgish has been reported to contrast long open front, central and back unrounded vowels, which is extremely unusual. The IPA prefers terms "close" and "open" for vowels, and the name of the article follows this. However, a large number of linguists, perhaps a majority, prefer the terms "high" and "low". ==Features== This often subsumes open (low) front vowels, because the tongue does not have as much flexibility in positioning as it does for the close (high) vowels; the difference between an open front vowel and an open back vowel is equal to the difference between a close front and a close central vowel, or a close central and a close back vowel. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「open central unrounded vowel」の詳細全文を読む スポンサード リンク
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