making a simple telephone. alexander graham bell invented the telephone
TRANSCRIPT
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 cupsSome 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
doesn’t come out from the cup.
Reminder
You have to keep thestring straight forbest listening quality.