Hundreds of years ago, rural folks knew that loud noise drove away evil spirits, and the bell is a prime example of a good noisemaker. The ringing of a bell causes vibrations which are the source of great power. Variations on the bell include the shaking of a sistrum, a ritual rattle, or the use of a “singing bowl”. All of these can help bring harmony to a magical circle. In some forms of Wicca, the bell is rung to begin or end a rite, or to evoke the Goddess.