The «Sirius-HALF» diffusers are designed for acoustic decoration of walls and ceilings, improving sound quality in various environments such as recording studios, home theaters, concert halls, and more. With 2D QRD (Quadratic Residue Diffuser) construction, these diffusers enhance diffusion, reflection, absorption, and sound isolation. They are ideal for creating a diffuse sound field, even in small spaces. ITEM SPECIFICS: Functionality: Diffusion, Scattering, Reflection, Absorption Frequency Range: 625Hz to 5000Hz Material: Laminated MDF, Acoustic Foam Size: 20x10 inches (50x25 cm) Panel Thickness: 6 inches (15.3 cm) Color Options: 10 available Overall NRC: 0.48 APPLICATIONS: Ideal for recording studios, podcast studios, home theaters, music rooms, offices, rehearsal spaces, and conference rooms. INTENDED USE: To scatter and partially absorb sound waves in various environments.