Megaphone construction and working principle explained
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YouTubeSrinath Srinivasan
Megaphone construction and working principle explained
An acoustic megaphone or a bullhorn is a portable cone shaped acoustic horn used to ampligy a person's voice or other sounds and direct it in a given direction. Nowadays the voice powered acoustic megaphone has been replaced by the electric megaphone which uses a microphone, an amplifier and a folded horn loudspeaker to achieve the same ...
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