<P> In England, for instance, it is estimated there are about 40,000 bell ringers ringing on rings of bells in the English full - circle style . This type of ringing cannot be automated because of the large rotating masses of the bells and the exact regulation in speed of striking that is required for change ringing . </P> <P> The high level of control exerted by ringers means the bells can be struck with both accurate and equal spacing, and can change their striking pattern at each stroke . In addition the Doppler effect due to the movement of the bell when it is struck, and the sharp attack of the strike and the fast die - away due to damping by the clapper, imparts a unique musical sound . </P> <P> This style of ringing takes place every week in several thousand belfries in England and is supported by the Central Council of Church Bell Ringers founded in 1891, which is also dedicated to representing change ringers around the world . </P> <P> This system originated during the Middle Ages, and was perfected in the 19th century . It is a form of full circle ringing which requires the bell ringers to manually swing the bells whilst standing beside them in the bell chamber . It was originally designed for an ensemble of four or five bells, nowadays it is also sometimes used for a set of six bells . </P>

What is the name of a bell ringer