Forming vowel /aʊ/ rhymed with 'now'

The vowel sound seriously need a name.   For now, we shall call it (unofficially) the 'now' sound (because it rhymes with the word 'now').

Forming the vowel sound /aʊ/ rhymed with the word 'now' (cow, pow, sound, etc).   Click on the link below to University of Iowa's Phonetics Flash Animation Project.  Then, click on "Dipthings" and click on "Dipthongs" and then click on "//".  You will get to the screen shown below.  Then, click on 'Play' to see how to form the vowel sound '/aʊ/'.