This same peak that I just described above can also change in position in your mouth. When the peak is closest to your teeth, it is in front . Toward the throat is back . Between the two is, obviously, central . If you can't picture it, try feeling around with your finger.
Vowels can be long or short .
In many languages of the world, tone plays an important role in distinguishing one morpheme from another. Notice that tone isn't the same as stress or intonation . All of these involve changes in the pitch of the voice. Stress, sometimes also known as accent, is the rise and fall of the pitch throughout the syllables of a word. Intonation is the rise and fall of the pitch throughout the words of a sentence.