How does a telephone work?

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Gymnast101

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I'm doing a science show and tell and I am going to be talking about how sound travels through a telephone. Any ideas?
 
When I was yong(er) I was told it was like a series of numbers travelling down the phone line to the other phone and then they get decoded and expressed as voice to the recepient. I guess in the end its just a series of electrical impulses that makes the sound.

Good luck with your show n tell anyway!
 
yes. see when you dial to someone's house the phone translates the signal into computer electrical pulses. A certain pulse for each number. and when all this is done it moves at light speed...well 99.97 % light speed. So when you talk into the phone it's QUICKLY translated from sound to the electrical pulses then moves through the cables and is retranslated back intio sound so the person on the other end can know what's going on. This is it in a nutshell
 
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