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Making a simple telephone

Making a simple telephone. Alexander Graham Bell invented the telephone. (1847 - 1922). Two main parts of a telephone. receiver (collects incoming sounds). microphone (sends sounds down a wire). The microphone changes sound waves to electrical signals and pass them down the phone.

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Making a simple telephone

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  1. Making a simple telephone

  2. Alexander Graham Bell invented the telephone (1847 - 1922)

  3. Two main parts of a telephone receiver (collects incoming sounds) microphone (sends sounds down a wire)

  4. The microphone changes sound waves to electrical signals and pass them down the phone. How does a telephone work?

  5. The electrical signals are changed back to sound waves and are collected by the receiver. How does a telephone work?

  6. A simple telephone microphone (sends sounds down a wire) receiver (collects sounds)

  7. How does a paper cup telephone work? Sound waves travel from one cup (microphone) to another (receiver) through the string (object).

  8. How to make a paper cup telephone? You will need: • 2 paper cups • Some string

  9. Steps • Make a hole in the bottom of each paper cup. • Put the string into the hole. • Tie a knot so that the string doesn’t come out from the cup.

  10. Reminder You have to keep the string straight for best listening quality.

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