Mid vowel

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IPA vowel chart
Front Near-​front Central Near-​back Back Close •iy •ɨʉ •ɯu •ɪʏ •ɪ̈ʊ̈ ʊ •eø •ɘɵ •ɤo •e̞ø̞ •əɵ̞ •ɤ̞o̞ •ɛœ •ɜɞ •ʌɔ •æ ɐ •aɶ •äɒ̈ •ɑɒ Near-close Close-mid Mid Open-mid Near-open Open
Paired vowels are: unrounded • rounded
Symbols with diacritics do not appear on the official IPA vowel chart. They are shown here for an easier access to articles.
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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 without specified rounding [ə].
There also are mid vowels that do not have dedicated symbols in the IPA:

• mid front unrounded vowel [e̞] or [ɛ̝] (commonly written [e], i.e. as if it were close-mid)
• mid front rounded vowel [ø̞] or [œ̝] (commonly written [ø], i.e. as if it were close-mid)
• mid near-front unrounded vowel [ë̞] or [ɛ̝̈]
• mid near-front rounded vowel [ø̞̈] or [œ̝̈]
• mid central unrounded vowel [ɘ̞] or [ɜ̝] (most often written [ə])
• mid central rounded vowel [ɵ̞] or [ɞ̝] (most often written [ɵ], i.e. as if it were close-mid)
• mid near-back unrounded vowel [ɤ̞̈] or [ʌ̝̈]
• mid near-back rounded vowel [ö̞] or [ɔ̝̈]
• mid back unrounded vowel [ɤ̞] or [ʌ̝] (commonly written [ɤ], i.e. as if it were close-mid)
• mid back rounded vowel [o̞] or [ɔ̝] (commonly written [o], i.e. as if it were close-mid)

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, because 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, 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

The Kensiu language spoken in Malaysia and Thailand is highly unusual in that it contrasts true-mid vowels with close-mid and open-mid vowels without differences in other parameters such as backness or roundedness.

Vowel phonemes (Oral) Front Central Back Close i ɯ u Near-close ɪ Close-mid e̝ ɚ o̝ Mid e ə o Open-mid ɛ ʌ ɔ Open a Diphthongs ie

Vowel phonemes (Nasal) Front Central Back Close ĩ ɯ̃ ũ Near-close ɪ̃ Close-mid ẽ̝ õ̝ Mid ẽ õ Open-mid ɛ̃ ʌ̃ ɔ̃ Open ã Diphthongs ĩẽ