Do you know that when you use your voice, you are really acting like a musical virtuoso? You are performing on one of the most difficult and complicated musical instruments known to man. And the reason you can do it is that you learned when you were young and have been practicing it.

Consider just the vocal cords, which are only part of the apparatus which produces our voice. Controlling them is a matter of the utmost precision. Sixteen muscles, the most delicate muscles in the body, move our vocal cords. They can assume about 170 different positions! Just the right amount of air has to be blown upward to make them vibrate in a certain way.