Application of microperf and microslit absorbers

Abstract

The theory of microperf and microslit absorbers is well established. Theoretical predictions match measurements with a high degree of accuracy. A normal incidence impedance tube measurement of a microperforated metal panel will illustrate this agreement. In this presentation, I would like to discuss how these transparent and translucent foils and panels have been used as both acoustical and decorative elements in projects. The microperf design is available in polycarbonate and ETFE foils as well as panels. The foils can also be printed for light shading. Since polycarbonate transmits in the infrared, the translucent foils can be used with back lighting on radiant ceilings. Several projects will be presented. The microslit design is typically available in panels, which can be transparent, translucent and digitally printed in graphic designs and signage. A graphically printed microslit atrium project will be profiled illustrating the architectural acoustic potential of this approach. These relatively new absorbers add an important tool to the acoustical palette and this presentation will illustrate how they have been used in a wide range of projects.