Answer:
It is a particular case of mechanical telephony, where sound is converted into vibrations along liquid or solid medium. These vibrations are transmitted along the medium and then reconverted back to sound. In the case of tin can telephone the medium is a string.
Answer:
Multiple reflection of sound waves. As a result, when sound is produced in a megaphone, the waves are reflected multiple times and travel in a path leading to the opening of the funnel.
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