Works great for windows.
This stuff is versatile and easy to work with.
I put them on the windows to try to canceling the noise from the highway near my apt.
Installed inside Pioneer BS-22 speaker cabinets.
I didn’t realize that this product has an adhesive peel on the back.
I guess I kinda knew that "Sonic Barrier" or "Acoustic Foam" really doesn't do any significant sound absorption, but I was hoping for more from this product...Here's the knitty-gritty: This stuff is GREAT if you only care about very minor sound-dampening for things like inside speakers, or inside your hollow wooden/metal door, or something else that has sound generally moving around, but you just want a bit less of it.
The actual DAMPENING aspects of this foam are slim-to-none.
(It's the same story with pretty much every "sound-dampening" foam out there, btw) This does not dampen any reverberations that might be going on within a chamber, it doesn't reduce feedback, it doesn't really affect sound at all going through the foam.
(from what I have found) The most sound-dampening part of this foam is the adhesive which blocks out sound fairly well, but it still doesn't dampen it noticeably.I hope you can find a use for this, but for me it is just some soft adhesive now... Just laying around...
I tried a cheaper triangle shaped foam that worked much better.