The vowels of the throat chakra are called the Matrika Shakti, the Little Mothers, for they are thought to birth the entire universe! 

Begin by doing the practice once or twice a day.  Practice slowly being attentive to each sound. Each sound is a mantra in and of itself. At this level of speech you are very close to the essence of all speech and all sound which is the Goddess Vak. Be attentive to how the practice awakens energy and the effects on you.