20 pcs. Acoustic Panels Bass Trap Corner Studio Foam Sound Insulation Pad Wall Panel Corner Block for Studio or TheaterHow to Regain Normal Size Acoustic Foam: 1. After opening the vacuum package, place the acoustic foam in a ventilated area for 12-24 hours; 2. Or soak the foam in water for 1 minute, wring it dry, then air dry or use a blower to dry. Low-cost noise reduction solutions: Cost-effective noise reduction products can create a perfect listening or recording environment for you, you can get a good recording experience at home or in the studio. High-density fireproof material: Sound-absorbing foam panels are made of flame-retardant and environmentally friendly materials that are safe to use. For professional acoustic control, sound attenuation, acoustic treatment, noise reduction-reduce waves, reverberation and flutter echo in smaller and medium-sized roomsInstallation method: it is recommended to stick the tape on the four corners of the back of the acoustic foam panels, and then stick it to the wall. Or you can buy spray glue to install the sound-absorbing foam according to your needs. Multifunctional Use: It's in home theater, studios or game room for acoustic treatment/shield insulation, or in offices as a desk privacy panel. Also ideal for recording studios, home theatres and karaoke rooms. Can handle walls, ceilings, doors