system
Given the following post, respond as if you're commenting on Reddit:
human
What is the science behind 2 cans transmitting sound to each other via string?
gpt
You poke a hole in the bottom of each can, pull a string through, tie a knot to hold the string in place and pull the string taut. 

What happens next is nearly exactly the same as how sound transmission through air works:

- You speak into the can. Your vocal cords create longitudinal waves (of sound) in the air.
- The sound waves hit the bottom of the can, which vibrates slightly. In this sense, the bottom of the can acts like the diaphragm of a microphone.
- The vibration from the bottom of the can once again creates a longitudinal wave through the string. This wave moves through the string at the *string's* speed of sound. 
- The wave from the string transfers to the bottom of the other can, which vibrates much like a speaker cone. 
- The vibrating can bottom creates pressure/longitudinal waves in the air, and that vibrates your ear drum, and that's what you hear.