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Making a simple telephone
Alexander Graham Bell invented the telephone
receiver (collects incoming sounds) microphone (sends sounds down a wire) Two main parts of a telephone
How does a telephone work? The microphone changes sound waves to electrical signals and pass them down the phone.
How does a telephone work? The electrical signals are changed back to sound waves and are collected by the receiver.
A simple telephone microphone (sends sounds down a wire) receiver (collects sounds)
How does a paper cup telephone work? Sound waves travel from one cup (microphone) to another (receiver) through the string (object).
How to make a paper cup telephone? You will need: 2 paper cups Some string
Steps 1.Make a hole in the bottom of each paper cup. 2.Put the string into the hole. 3.Tie a knot so that the string doesnt come out from the cup.
Reminder You have to keep the string straight for best listening quality.
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