Question

What is megaphone? Name the principle on which a megaphone phone works

Answer 1

A large funnel-shaped device for amplifying and directing the voice.

Answer 2

$\Large{\underline{\underline{\bf{Solution :}}}}$

★ Megaphone :

Megaphone is a horn-shaped tube. Megaphones are used for addressing a small group of people.

Speaking tube is a hollow tube– one end is the speaker's end, whereas the other one is the listener's end.

In these devices, the sound waves suffer reflection repeatedly and the energy of the waves remains confined to the tube. The sound waves are prevented from spreading out.

It is for this very reason that loudspeakers also have horn-shaped opening.