Single bells are used in churches, as a call to worship, a call to prayer (such
as the Angelus), for tolling, and to celebrate joyous occasions such as
marriage. In educational institutions and in public buildings, single bells
are often used to mark the hours of the day, often in conjunction with
a tower clock; and sometimes are used to celebrate holidays, or sporting
victories, or to mark times of national significance.
The tone of a larger bell is deeper and more sonorous than a smaller
bell, and a larger bell will swing at a slower rate. Bells are
specified by their diameter, weight, and musical tone.