I double checked and yes, it’s still true: You can replace the cup in the string telephone with your ear canal and eardrum: It is doing the same thing. This means that you can accurately model this part of HEARING A SOUND by drawing an actual line (like a taut string) between sound source and eardrum itself.

I double checked and yes, it’s still true: You can replace the cup in the string telephone with your ear canal and eardrum: It is doing the same thing.
 
This means that you can accurately model this part of HEARING A SOUND by drawing an actual line (like a taut string) between sound source and eardrum itself.

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