母音のacceptable areas chart (Gimson 1980を参考に作成)

  ɛːは、練習のため/ɛə/でなく純母音的な[ɛː]で練習します 

Last updated on 5 May, ver. 2.

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ɪ
ɜː, ə
e
æ
ʌ
ɑː
ɒ
ʊ
ɔː
ɛː