Our CoreBOO Perf Panel line revolves around the idea of resonant sound absorption, which involves trapping air to modify certain frequencies of sound. Different hole sizes and their densities provide selective absorption of different frequencies, all which can be varied to a greater or lesser extent based on installation method and related ‘air’ space allocated behind our panels. The CoreBOO ‘Solid’ Perf’ Panels are solid ¾” thick panels that are available in 3 options, each with a different perforation size, and are designed with symmetry and specific frequency absorption in mind. Note: custom perforation diameters and layouts available upon request.