Question

What is the megaphone name the principle on which it is based?

Answer 1

A Megaphone, Speaking Trumpet, Bullhorn, 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.
A Megaphone works by forcing the sound that comes from a person's voice into one direction making it louder.

Answer 2

Answer:

amplify

Explanation:

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