What is another word for loud hailer?
Pronunciation: [lˈa͡ʊd hˈe͡ɪlə] (IPA) 
A loud hailer, commonly known as a megaphone, is a device used to amplify sound and make it louder. The word loud hailer is of British origin and is often used interchangeably with microphone, bullhorn, or PA system. Other synonyms for the term loud hailer are voice amplifier, loudspeaker, and public address system. In sports, the term cheerleader's megaphone is also used to refer to the instrument. Loud hailers have varied uses including, in protests, emergency services, on tour boats, and in sporting events. They are especially useful in situations where the sound needs to be projected over long distances or is competing with other surrounding sounds.
