“Foam does not stop sound from going through walls or ceilings.
I thought I should just go ahead and get that out of the way. It is used to stop echoes in a room. The reason you see it in soundproofed recording studios is because they have already done things to the walls to block the sound from going through, then lined them with foam to stop the echo. So stopping echo is important but if your only concern is your neighbor not hearing your subwoofer through the wall, foam is not going to do anything at all. It is the wrong tool for the wrong job. Also, bass traps may sound like a device that traps all the bass from leaving a room, but they do not. They stop standing waves, which add a warbling noise to the bass within the room—kind of the same situation.
What stops sound then? Heavy things. Layers of heavy things that are air tight and dampened so they do not vibrate, or are made to be floppy in the first place so they will never vibrate, covering 100 percent of a wall, ceiling or floor…” To read more, click below!
How to Soundproof
Walls & Ceilings
By: Matt Boughan
May 8, 2012
For full article, please click here: http://www.wconline.com/articles/87922--how-to-soundproof