How To Restore The Acoustic Foam To Its Original 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 1 minute, gently squeeze out excess water, then air dry or use a blower to dry. Cost-Effective Noise Reduction Solution: These acoustic foam panels help reduce unwanted noise and improve sound quality, making them suitable for creating a better listening or recording environment in studios, home theaters, or similar spaces. High-Density Flame-Retardant Material: Made from flame-retardant and environmentally friendly polyurethane material, these sound-absorbing foam panels are safe for use in various indoor settings. Designed for professional acoustic control, they help reduce sound waves, reverberation, and flutter echoes in small to medium-sized rooms. Installation: It is recommended to attach adhesive tape to the four corners of the back of the foam panels and stick them to the wall. Alternatively, use spray adhesive for more secure installation based on your preference. Multi-Functional Use: Suitable for use in home theaters, recording studios, gaming rooms, offices, and more. Can be used as acoustic treatment panels, isolation shields, or desk privacy dividers. Ideal for installation on walls, ceilings, and doors. Color: Black Material: Polyurethane Size: 12 x 12 x 48 cm Package Contents: 4 x Soundproofing Foam Panels Note: Lighting and monitor settings may cause slight variations in the color as shown in images. Measurement may vary by ±1-3 cm.