Does a glass cup work to hear past a wall??

Question

You know in those kid shows where a kid would get a cup and use it to hear into another room??

Answer 1

one time my parents were talking about me and some guy, and i wanted to hear, so i tryed that, and it KINDOF worked.. lol :]

Answer 2

the vibrations bounces off the walls u can actually hear through it, try it and see!

Answer 3

Haha. My Sister did that tonight...

It does work, I asked her!  

Answer 4

yes it does.  

Answer 5

yup, it works.