24 Pack-12 x 12 x 2 Inches Pyramid Designed Acoustic Foam Panels, Sound Proof Foam Panels Black, High Density and Fire Resistant Acoustic Panels, Sound Panels, Studio Foam for Wall and Ceiling

These work really well. I didn't wait 2 days. I had them ready to post up within 6 hours. After pulling it out of the plastic they began to rise by themselves. I quicken the process by simply gently pulling the stubborn corners in each direction. I also got them to fluff evenly all around by gently tugging opposite corners as well as the mid left side to right side. Pulling too hard would probably rip it.To rid of the smell quickly I stood each square upright in my bathroom-- some against the wall, and some leaning on each other-- so it can air out. The major thing that helped here is that I have an exhaust fan in the bathroom, and so by closing the door it sucked air through the foam even more quickly. Didn't have to stink up the house or leave it outside where allergens might grab on.As for adhesion, the thing that worked for me was letting spray adhesive on the backside, and then using velcro with the adhesive backs on them.This doesn't cancel out noise completely like some people expect here... but it definitely does a great job dampening to a large extent. I have thin windows, and the neighbor hasn't had a problem with me since.

Turned my closet into a vocal booth with a couple packs of this. Works great. The only challenge is getting them to stick to the wall. What you think will work probably won't.

I bought these as I worked from home. They do reduce ambient noises in the environment but not high frequencies of noise like normal talking. Looking in up on YouTube, that’s what a person stated. The flat sound proofing panels would be better.

It didn't come with a way to put it on the wall. I had to use a staple gun to get these to work. They have reduced the sound in my room and has helped improved insulation, not as cold anymore.

Some customers have left review stating that the foam did not decompress very well. This is true on some of the tiles, but the instructions say that you have to soak the tiles in water. Not all of them just the ones that don’t decompress well.These are good. Actually, very good.

I ordered 4 packs of the (24) 12 X 12 X 2. 2 of 4 are good quality. The other 2 packages are unusable. The foam is flat and didn’t expand. I tried to figure out how to contact seller to replace but all I have is the return option. Returning 48 panels of foam is cumbersome and the time it would take to re-compress, package, drive to shipping isn’t worth it. If this isn’t corrected by seller I’d recommend buying from someone else.

Using this to reduce the sound of my compressor in my work shop it has worked exactly as needed

I ordered these for my podcast studio, and they’ve been perfect! Delivery was quick, the product arrived exactly as described, and installation was a breeze. The foam does a great job at reducing echo and improving overall sound quality. No complaints at all—if you need affordable and effective soundproofing, this is a great choice! Highly recommend