8 Pack - Bass Traps Acoustic Foam Corner, 8''x8''x12'' Black Bass Traps Corner Studio Foam, High Density and Fire-Proof Bass Traps Acoustic Panels Recording Studio Acoustical Treatments

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.

Precisely what I was seeking for my wall. Some panels exhibited a slightly gray tint compared to black, but the finish remained consistent with my expectations.

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.

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

Low quality of product overall, I used this as a back panel to sound proof a door. It gave good results but I did not get the full 34 feet of material. My space was 30” x 84” or about 21 feet and just made it. Six of the panels were damaged on one row or more plus four were flat. See pictures. If you need this buy more than you need or be disappointed. Thanks