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Solar/cellular shades -acoustical treatment

My right speaker is about 5 feet(ft) from the sliding glass doors (8 ft high by 16 ft wide) and is presently covered by solar shades. I have slap echo and reverb issues in the room and this is my first reflection point. I wanted to tackle this issue first when planning my acoustical treatment.

I have been told that solar shades have an NRC of about 0.15 so I was thinking of adding a set of cellular shades which I have been told has an NRC of 0.7. However, before investing a few thousand dollars I thought of asking if anyone had any experience with cellular shades and their acoustical absorptive performance. Manufacturers have not be able to provide any test data concerning acoustical performance. Also, any thoughts on any manufacturers' product acoustically better than the other.
thanks
Joe
joe11554
joe11554 OP
29 posts
 
I have been playing with 4 ft x 10 ft panels of Owen Corning 800 1.5 inch rigid duct insulation for the past 4 months. When placed at first reflection point on window there is a noticeable improvement. NRC of panel is around .85, so A little better than cellular shades are supposed to be. Just can not find any test data to confirm cellular and solar shades performance and thought someone may have experience with solar and cellular for comparison.
joe11554 OP
29 posts
 
No one out there with experience with solar vs cellular shades for acoustical properties???
dkarmeli
334 posts
 
Joe, I've come across both in various installations, neither one of them offers any acoustical properties worth talking about. I wouldn't spend money changing from one to the other. Treating large glass surfaces effectively is very tough, there are things that can be done but not in isolation, it has to be as part of a balanced approach to the whole space.

david
joe11554 OP
29 posts
 
Hate to hear no much of a difference, but I would rather hear it before speaking the money. Thanks for the input. I guess my next step is treating the walls. Is this what you mean by a balanced approach?
dkarmeli
334 posts
 
What I meant was to look at the room as one space and not as separate bits. You have to look at the room as one connected space and not just treat one side without thinking about the opposite side. You need to balance both sides acoustically first, then attack the other issues.

david
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