This acoustic device serves two purposes, a diffuser and absorber. Its convex curve accomplishes some diffusion while some acoustic information passes through the holes in the pegboard and is absorbed in the insulation.
Step 1: Start with a standard 8 ft x 4 ft piece of pegboard.
Step 2: Curve the pegboard along the 8 ft side.
Step 3: Attach the curved piece of pegboard to a 7 ft x 4 ft piece of plywood or 1/8th inch board. You may want to build a framework of 2 x 4’s or a cut piece of plywood to bridge the gap between the curved pegboard and the straight backing board.
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tep 4: Fill the gap with absorptive material such as fiberglass, recycled cotton, or newspaper insulation.
Step 5: Cover the structure with fabric. It doesn’t need to be any specific fabric as long as it is somewhat permeable.
Step 6: Attach the structure to a wall in your studio, and enjoy.
The Effect: The finished product accomplishes both diffusion and absorption. As seen on the left the red arrows reflect off of the convex surface creating 
diffusion, while the black arrows represent energy that passes through the holes and is absorbed into the insulation inside. This design can be used for all types of surfaces and sizes. A studio designed with acoustic structures similar to this design covering most of the walls is going to be better sounding than a room covered in foam.
