Professional sound absorbers: acoustic foam is installed to reduce noise pollution, as they remove echoes and background noise by not blocking the sound absorbing it. Sound absorbers are used to control reverberation noise, and this differs greatly from sound insulation. recovery may take some time due to the high density and compressed packaging. If some of cannot be restored within 24 to 48 hours after opening, in water, squeeze to dry, the sound absorber will quickly. More comfort/less stress acoustic foam: The most common problem in rooms with high ceilings is the . An creates multiple wavelengths of retracting sound waves that disturb the conversations in the room. Sound absorbers unwanted sounds such as echoes and surrounding noise and make other sounds clearer. Quick installation sound insulation: equipped with self-adhesive materials, pyramid foam is lightweight and can be installed on a of different surfaces (walls, doors, windows, ceilings, etc.). The self-adhesive acoustic foam is also easy to cut, changes do not affect the performance of the foam board. Color: black Material: polyurethane Package Contents: 12 x studio foam Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.Products from GuanGuan's store