The mid central vowel (also known as schwa) is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ə, a rotated lowercase letter e. The same symbol may be used for both the unrounded and the rounded forms of the mid central vowel, although there exist certain other notations that may be used to represent either variant specifically.
Mid central unrounded vowel
The mid central unrounded vowel is frequently written with the symbol [ə]. However, this symbol may not specifically represent an unrounded vowel, and it is frequently used for almost any unstressed obscure vowel. If precision is desired, the symbol for the close-mid central unrounded vowel may be used with a lowering diacritic, [ɘ̞]. Another possibility is using the symbol for the open-mid central unrounded vowel with a raising diacritic, [ɝ̝]
