Close-mid central unrounded vowel Close-mid central unrounded vowel The close-mid central unrounded vowel, or high-mid central unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is . This is a mirrored letter e, and should not be confused with the schwa , which is a turned e. It was added to the IPA in 1993; before that, this vowel was transcribed (Latin small letter e with umlaut, not Cyrillic small letter yo). Certain older sources transcribe this vowel . The letter may be used with a lowering diacritic ,
Close central rounded vowel near-close central rounded vowel in some languages. The close central protruded vowel is typically transcribed in IPA simply as , and that is the convention used in this article. As there is no dedicated diacritic for protrusion in the IPA, symbol for the close central rounded vowel with an old diacritic for labialization, , can be used as an "ad hoc" symbol for the close central protruded vowel. Another possible transcription is or (a close central vowel modified by endolabialization), but this could be misread as a diphthong. "Note: Because central rounded vowels are assumed to have protrusion, and few