FAVE Vowel module

fave.extract.vowel.isDiphthong(v)

checks whether a vowel is a true diphthong (ay, aw, oy)

fave.extract.vowel.isIngliding(v)

checks whether a vowel is ingliding (ae, ah)

fave.extract.vowel.isShort(v)

checks whether a vowel is short (o, e, i, u, ^)

fave.extract.vowel.isUpgliding(v)

checks whether a vowel is upgliding (iy, ey, ay, oy, uw, ow, aw)