The open back unrounded vowel, or low back unrounded vowel,[1] is a type of vowel sound, used in some spokenlanguages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ɑ⟩, and the equivalent X-SAMPA symbol is A. The letter ⟨ɑ⟩ is called script a because it lacks the extra hook on top of a printed letter a, which corresponds to a different vowel, the open front unrounded vowel. Script a, which has its linear stroke on the bottom right, should not be confused with turned script a, ɒ, which has its linear stroke on the top left and corresponds to a rounded version of this vowel, the open back rounded vowel.
In some languages (such as Azerbaijani, Estonian, Luxembourgish and Toda)[2][3][4][5] there is the near-open back unrounded vowel (a sound between cardinal [ɑ] and [ʌ]), which can be transcribed in IPA with ⟨ɑ̝⟩ or ⟨ʌ̞⟩.
Features
Its vowel height is open, also known as low, which means the tongue is positioned far from the roof of the mouth – that is, low in the mouth.
Its vowel backness is back, which means the tongue is positioned back in the mouth without creating a constriction that would be classified as a consonant. Unrounded back vowels tend to be centralized, which means that often they are in fact near-back.
It is unrounded, which means that the lips are not rounded.
Backness varies among dialects; in the Standard Northern accent it is fully back.[16][14] In the Standard Belgian accent it is raised and fronted to [ɑ̝̈].[15] See Dutch phonology
Fully back. Broad varieties usually produce a rounded vowel [ɒː ~ ɔː] instead, while Cultivated SAE prefers a more front vowel [ɑ̟ː~äː]. See South African English phonology
Used by speakers in Northern Germany, East Central Germany, Franconia and Switzerland.[41] Also a part of the Standard Austrian accent.[42] More front in other accents. See Standard German phonology
The quality varies between open back [ɑ],[51] open near-back [ɑ̟][52] and near-open near-back [ɑ̽][53] (illustrated in the example word, which is from the Maastrichtian dialect), depending on the dialect.
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