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Perturbation theory

150th Anniversary of the Bell Vowel Model 5

September 2017 saw the 150th anniversary of Alexander Melville Bell’s vowel model. However innovative it may have seemed, his notion of continuous… 806 more words

Vowels

Is cardinal 4 front or central?

150th Anniversary of the Bell Vowel Model 4

September 2017 saw the 150th anniversary of Alexander Melville Bell’s vowel model.  Daniel Jones’ cardinal vowel system was a modification of Bell’s model, especially reducing Bell’s three… 2,275 more words

Vowels