A megaphone, speaking-trumpet, bullhorn, blowhorn, or loud hailer is a portable, usually hand-held, cone-shaped acoustic horn used to amplify a person’s voice or other sounds and direct it in a given direction.
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acoustic amplifier amplify and announce announcement attention background blowhorn broadcasting bullhorn communication communications cone direct direction equipment given hailer hand held horn icons image loud manager megaphone message object objects one other person portable screaming shaped shouting single sound sounds speaker speaking speech talk talking technology trumpet used usually voice white
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