Piece Tin

Do the 2 tin can and a piece of string phones work – if so, how and what would be the maximum string length?

Do the 2 tin can and a piece of string phones work – if so, how and what would be the maximum string length?
I remember trying this as a kid but could never tell wether it was just me hearing my brother as he was only standing 6ft away from me or if the tin can was actually working

Why it Works

When someone speaks or makes a sound, the air ripples or vibrates. The word ‘vibrate’ means to move up and down, or back and forth rapidly. Our ears collect the sound vibration, or sound waves and send them to our brains. Then we hear the sound.

When you pull the string tight and talk into one of the cans of your tin can telephone, the sound vibrates across the taut string to the other can. The person at the other end of the telephone hears your message after his or her ears collect the sound vibrations and send them to the brain to be processed.

http://www.dsokids.com/2001/dso.asp?PageID=100

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