Mid vowel

IPA vowel chart
Front Near-​front Central Near-​back Back Close •iy •ɨʉ •ɯu •ɪʏ •ɪ̈ʊ̈ •ʊ •eø •ɘɵ •ɤo •e̞ø̞ ə •ɤ̞o̞ •ɛœ •ɜɞ •ʌɔ •æ ɐ •aɶ •ä •ɑɒ Near-close Close-mid Mid Open-mid Near-open Open
Paired vowels are: unrounded • rounded
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A mid vowel is a vowel sound used in some spoken languages. The defining characteristic of a mid vowel is that the tongue is positioned mid-way between an open vowel and a close vowel. The only mid vowel with a dedicated symbol in the International Phonetic Alphabet is the mid central vowel [ə], a symbol which is also used for the vowel schwa.

The IPA divides the vowel space into thirds, with the close-mid vowels such as [e] or [o] and the open-mid vowels such as [ɛ] or [ɔ] equidistant in formant space between open [a] and close [i] or [u]. Thus a true mid front vowel could be transcribed as either a lowered [e̞] or a raised [ɛ̝].

Few languages contrast all three heights of mid vowel, since it is rare for a language to distinguish more than four heights of true front or back vowels. One, the Amstetten dialect of Austro-Bavarian German, contrasts four heights of front unrounded, front rounded, and back vowels in addition to having an open central vowel. These have been transcribed with the available IPA symbols /i e ɛ æ/, /y ø œ ɶ/, /u o ɔ ɑ/, and /a/.

	Amstetten Bavarian (transcription)
Close	i	y	u
Close-mid	e	ø	o
Open-mid	ɛ	œ	ɔ
Near open	æ	ɶ̝	ɑ̝
Open		a

However, the vowels transcribed /æ ɶ ɑ/ are one-third the distance between open /a/ and close /i y u/, precisely the IPA definition of open-mid vowels [ɛ œ ɔ]. Thus Amstetten Bavarian may be an example of a language that contrasts mid vowels with both open-mid and close-mid vowels.

	Amstetten Bavarian (formant space)
Close	i	y	u
Close-mid	e	ø	o
Mid	e̞	ø̞	o̞
Open-mid	ɛ	œ	ɔ
Open		a

See also

• Lowered (phonetics)
• Raised (phonetics)