Pyramid Designed Acoustic Foam Panels, Sound Panels, High Density And, Black. ?Outstanding Sound Absorption? - Distinct pyramid 3D acoustic design, these panels increases the contact area with sound. Therefore, they does an excellent job in absorbing flutter echoes, reverberation and standing waves. Compared with 1 inches panels, this 2 inches panels make much more difference in acoustic treatment. ?Improve Sound Quality Clarity?These high dense panels can reduce unwanted echoes, reflections. Sound listens less harsh and much clearer after these panels installed on wall or ceiling. Perfectly good for video, audio recording, interview, meeting, podcast, live, music, and gaming romm. ?Specifications? - Every package comes with 24 pack set black pyramid shaped acoustic panels which covers 24 sq ft in total. The dimension is 12 x 12 inches of 2 inches(from bottom to its peak)for each tile. High density (25kg/m3), flame retardant, and made of non-toxic polyurethane foam, we are committed to providing an affordable and healthy sound panel for acoustic treatment. ?Rapid Expansion? - What makes our acoustic panels unique is that they puff up to full shape and size rapidly. Usually it takes less than 24 hours to expand, but may take longer sometimes. Just separate the panels from interlocking status and let them sit in a well ventilated place, they will quickly be what you want. You won?t see any worry for the package of vacuum sealed. ?Easy to Install?These Soundproof wall panels are made of 100% polyurethane sponge, no health risk. Upgraded flame retardant acoustic foam panels, in case of fire caught, they will come to an end on their own within 1 minute. 1 adhesive sticker or spray adhesive to each corner and 1 to the middle is all it takes to install these panels to the wall or ceiling. Our sound foam panels can be easily cut to smaller size to fit different surface.