SONEX Pyramids, Natural White, 4" x 2' x 2', offer effective acoustic control in an attractive pattern suitable for architectural projects, conference rooms, multipurpose rooms and industrial facilities. SONEX Pyramid wall panels, 4" thick, feature a 0.95 Noise Reduction Coefficient (NRC). The geometric design deflects and disperses sound waves, allowing the open cell willtec foam to convert sound energy into quiet, kinetic energy.