4 pcs. Studio Panels Acoustic Sound-Absorbing Foam, Sound Treatment Triple-Burst Corner Bass Trap, Sound Panels Foam Wedges1. High-density fireproof material: Sound-absorbing foam panels are made of flame-retardant and environmentally friendly materials that can be used safely. For professional acoustic control, sound attenuation, acoustic processing, noise reduction-Reduce waves, reverberation and flutter echo in smaller to medium-sized rooms.2. 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.3. How to recover normal size acoustic foam: 1. After opening the vacuum package, place the acoustic foam in a ventilated place 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.4. Installation method: it is recommended to stick the tape on the four corners of the back of the acoustic foam panels, and then stick it on the wall. Or you can buy spray glue to install the sound-absorbing foam according to your needs.5. Multifunctional Use: It's in home theater, studios or game room for acoustic treatment/insulation cover, or in offices as a desk privacy panel. Also ideal for recording studios, home theatres and karaoke rooms. Can