Clapper (noun)

1. A device used to make a loud noise by striking two objects together.
2. A part of a bell that strikes against the side to produce a sound.

Origin:

Derived from the middle english word 'clappere' meaning 'something that claps'.

Examples:

1. The clapper of the old church bell had worn away over the years, leaving the bell silent.
2. The children used sticks as makeshift clappers to make music.
3. The clapper in the school bell was replaced, restoring the bell's ringing sound.
4. The clapper of the antique Chinese gong was missing, so the gong could not be played.
5. The clapper of the fire alarm was activated, causing an ear-piercing screech throughout the building.