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ᴍᴏᴜᴛʜ vowel phoneme /aʊ/

From Teflpedia

The ᴍᴏᴜᴛʜ vowel phoneme /aʊ/ is an English vowel phoneme consisting of the vowel sound used by English speakers in its keyword mouth.[1] It’s a ʊ-closing diphthong. It’s represented in broad notation as /aʊ/.

Words from the ᴍᴏᴜᴛʜ lexical set are pronounced with this phoneme.

In reference accents, this is pronounced as a diphthong. In RP and Gen Am, the diphthongal nucleus is the open front unrounded vowel sound [a], and the diphthongal glide is the near-close near-back rounded vowel [ʊ].

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