Perforated Acoustic Metal Panels (Sandwich Panels)Realco Power Projects Absorber Panel are highly durable perforated panels which are used to control background and reverberant noise. Although primarily intended as an absorber, the panels will act as a barrier when a solid sheet metal back is added, further performance enhancement can be done by applying intermediate sheet metal as custom design. Realco Power Projects Panels are excellent sound absorbers over a wide frequency range. Their acoustic properties combined with their rugged durability make them a perfect choice for test chambers, Generator rooms, factories, auditoriums, mechanical equipment rooms, gymnasiums, theatres, garages, hallways and other spaces where reverberant noise is a problem.Realco Power Projects are also suitable for outdoor use (extra water proofing layer will be added for the core infill). Realco Power Projects panels can be attached to walls, ceilings or other surfaces. They are available with optional rear backing to increase their transmission loss and be used as a barrier. In addition, Realco Power Projects Panels can be faced with perforated material on both sides and used as hanging absorptive baffles.panels are constructed from galvanized steel or Aluminium perforated facing. Each panel can be filled with a 2" or 4" thick, encapsulated glassfiber/RockWool sound absorber. The perforated metal face is powder coat ,painted in a variety of specified colours. The Noise Reduction Coefficient (NRC) vary from 0.8 to 0.95ssssUsage: Sound Absorbers, Noise BarriersDimensions: As per customiseColour: Products are available in any RAL colour (full RAL colour selection chart available upon request). Custom colour matching is also offered.