Can some one help me with something simple please?

[Ruthless]

What is the sound proof foam called? Can I get it at Home depot? How much does it it cost for a medium sized room??

 

[bubbagump]

This will tell you nearly everything you need to know.

http://ethanwiner.com/acoustics.html

 

[RICK FITZPATRICK]

There is NO such thing as "soundproof" foam. Foam does absolutely nothing to stop the transmission of sound.

 

[SonicClang]

Ruthless, before anyone helps you with such a stupid question, please make an attempt to save face and do a little research and then come back.

If I wasn't such an advocate for fire safety I'd make a sarcastic comment about using cheap foam, but I don't ever want to give anyone the wrong idea about foam and cause harm or death.