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

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Solution

A megaphone is a large cone-shaped device used for amplifying and directing the voice of a person who speaks into it. A megaphone works on the principle of multiple reflections of sound. It is used for addressing a small gathering of people.

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

Which of the following device does not work on the multiple reflections of sound waves ?

(a) slethoscope

(b) hydrophone

(d) megaphone

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