Mouthpiece 
Mouthpiece
Description:
The Mouthpiece is that part of the instrument which is placed partly in the player's mouth and to which the reed is attached. Its provides an opening through which air enters the instrument at one end of an air chamber. The player's breath causes the reed to vibrate, making the column of air inside the instrument also to vibrate. A Mouthpiece with a rounded chamber will produce a different sound from one with a small or square chamber.