Tin Can Telelphone

Description:  The tin can telephone is made of a string connecting two tin cans or paper cups. When the sender talks into one side it vibrates air in the cup which vibrates the bottom of the cup. This vibration is transferred through the string and received at the other end by sound. This phenomenon can be used to address sound as vibrating materials and can be used as an example of a communication device.

Web Resource: Talk through a String Telephone

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By This is from Project Runeberg book called The key to science In swedish., Public Domain, Link

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By Robert Benson [CC0], from Wikimedia Commons