Go to the Armstrong site and take a look at their 'wave' product, it will give you some ideas.
Taming a bulkhead
My listening room has an 8' drywall ceiling with a drywall bulkhead containing the ac duct running between the right and left walls right over my listening position. The bulkhead comes down 11" from the ceiling. Should I be treating the 11" edge (facing my speakers) with an absorbent acoustic panel? I have a 2'x4' acoustic panel that I can readily cut down to make a 11" x 4' panel and attach to the bulkhead, but hate to ruin a nice panel if this is the wrong approach. Any thoughts?
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