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Discussion Starter · #1 ·
I've seen some builds that include a 1/2" air gap behind the acoustic treatments, particularly on the front & back walls. Is the air gap recommended for acoustic reasons? If so, does it also apply to the corner traps as well?
 

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Bass traps mounted parallel to a wall always benefit from an air gap. Half can inch is not enough to do much, but four inches is great. In theory, the ideal gap is equal to the panel thickness. More here:

http://www.ethanwiner.com/acoustics.html#air%20gap


However, bass traps that straddle a corner already have a gap, so in that case there's no benefit from spacing the edges away from the wall.


--Ethan
 

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Discussion Starter · #3 ·

Quote:
Originally Posted by Ethan Winer /forum/post/19523458


However, bass traps that straddle a corner already have a gap, so in that case there's no benefit from spacing the edges away from the wall.

What about the popular option of stacking triangles of OC 703 in the corner. Would one benefit from having an air gap behind this type of corner treatment?
 

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Filling a corner is better than using a 3 to 6 inch thick panel, but it's only a little better. If the 3x cost of materials for about 25 percent more absorption is worth it to you, go for it. Otherwise, you're better off using the same amount of material to make more panels to cover more corners.


--Ethan
 
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