The rɑɪt sɑʊnz?
Angus Grieve-Smith writes:
I was always taught that the most straightforward way to write American diphthongs is [aj] and [aw], and the "long" mid vowels as [e] and [o]. Recently I've been seeing [ɑɪ ɑʊ ɛɪ] and [ɔʊ] popping up. This seems to reflect at least three different changes:
(1) A shift from using [j w ɰ] to represent glides, to representing diphthongs as a series of vowel sounds.
(2) A shift to greater detail in these representations.
(3) A shift in the standard from somewhere close to my dialect (Hudson Valley) to … someplace else.
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