Bell - A simple sound making device.

A bell (old Saxon: bellan, to bawl or bellow) is a simple sound-making device. The bell is a percussion instrument and an idiophone. Its form is usually a hollow, cup-shaped acoustic resonator, which vibrates upon being struck. The striking implement can be a tongue suspended within the bell, known as a clapper or uvula, a separate mallet or hammer, or—in small bells—a small loose sphere enclosed within the body of the bell.