How To Restore The Acoustic Foam To Its Normal Size: After opening the vacuum package, place the acoustic foam in a well-ventilated area for 12-24 hours to allow it to expand. Alternatively, soak the foam in water for one minute, gently squeeze out excess water, then air dry or use a blower to speed up drying. Cost-Effective Noise Reduction Solution: These afable acoustic panels help create an improved listening or recording environment, enhancing sound quality in studios, home theaters, and other spaces. High-Density Flame-Retardant Material: Made from flame-retardant and environmentally friendly polyurethane foam, these sound-absorbing panels are safe for use in various indoor settings. Designed for professional acoustic control, they help reduce unwanted noise, echoes, reverberation, and flutter in small to medium-sized rooms. Installation: It is recommended to attach adhesive tape to the four corners of the back of each panel and mount them directly on the wall. Alternatively, you may use spray adhesive for a more secure installation based on your preference. Multi-Purpose Use: Suitable for use in home theaters, music studios, gaming rooms, offices, and more. Can be used as acoustic treatment, isolation shields, or desk privacy panels. Ideal for application on walls, ceilings, and doors in recording studios, living rooms, and karaoke rooms. Color: Black Material: Polyurethane Size: 12 x 12 x 48 cm Package Contents: 4 x Soundproofing Foam Panels Note: Only the items listed above are included. Other accessories or furnishings shown in images are not included. Due to lighting and display differences, actual product color may vary slightly from images. Measurement allows for a tolerance of ±1-3 cm.