In addition to single vowel sounds, we regularly create sounds that consist
Of a combination of two vowel sounds, known as diphthongs. When we produce
Diphthongs. Our vocal oranges move from one vocalic position [a] to another [I]
As we produce the sounds [aI], as in Hi or Bye. The movement in this towards high
back, coming [a] and [u] to produce the sound [au], which is the diphthong repeated
In the traditional speech training exercise [hau nau braun kau].