Some people advise putting some type of reflective surface on broadband absorbers and bass traps. This prevents the traps and absorbers trapping too much HF and causing the room to sound dead and lifeless. The bass trap still allows LF to pass through though. If the back, sides, top and bottom of the trap is open, these surfaces also add to the overall absorption surface of the bass trap, albeit to a lesser extent than the front (room-facing) surface.
I have seen some references to these surfaces, and some being made according to some formulas - i.e. how broad the strips and gaps of the reflective surfaces should be. Has anyone experimented with this? Also, what reflective material would be used?
GIK calls their surfaces a "scatter plate" and seems to be made of a 6mm hardboard-type of material. They also seem to line up the slats vertically, with different width gaps and slats if you look at their picture carefully:
http://www.gikacoustics.com/product/gik-acoustics-scatter-plate/
I have seen some references to these surfaces, and some being made according to some formulas - i.e. how broad the strips and gaps of the reflective surfaces should be. Has anyone experimented with this? Also, what reflective material would be used?
GIK calls their surfaces a "scatter plate" and seems to be made of a 6mm hardboard-type of material. They also seem to line up the slats vertically, with different width gaps and slats if you look at their picture carefully:
http://www.gikacoustics.com/product/gik-acoustics-scatter-plate/
