Improve vocal clarity, flutter echo, reverberation, and modal issues.Medium and high standing waves are waterproof, moisture-proof, and have good air permeability.It can block sound anywhere and prevent indoor echo.These wall panels can provide excellent noise reduction effects and are suitable for recording studios, recording studios, vocal studios, and control rooms.Uses: Very suitable for use on corners, ceilings, etc.Application range: household noise control (walls, pipes, ceilings, etc.).Noise control in the workplace (walls, partitions, meeting rooms, etc.).Entertainment noise control (KTV room, walls, ceiling, floor, etc.).Noise control (factory walls, roofs, equipment, doors, control rooms, etc.)colour: silver-gray Material: polyester fiber cotton size: 30x30x0.9cm Packing:12*Acoustic panelsPlease understand that due to differences in lighting or computer monitors, I cannot guarantee that the photos and actual colors are 100% the same.Due to different measurement methods, there may be a deviation of 1-2cm.Note: Light shooting 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.