Self-Adhesive Acoustic Panels, 12 Pcs High Density Soundproofing Panels for Ceiling/Door/Wall Decoration and Acoustic Treatment (12" X 12" X 0.4") : Amazon.co.uk: Musical Instruments & DJ
TroyStudio Thick Acoustic Foam Panels, 30 X 30 X 5 cm 6 Pcs Broadband Sound Absorbing Foam, Dense Soundproof Padding Tile, Recording Studio Foam Absorber, Groove Decorative 3D Wall Ceiling Panel :