sae panel absorbers

hatch · Post by **hatch** » Thu Apr 13, 2006 7:01 am

hi, first post here, should be dead simple.
i'm building the sae panel absorbers, with a triangular profile, and i've used tongue and groove for the front panels.
when it says a 'sealed' box. does that mean air-tight? would it be a good idea to silicone all the seams on all facets?
many thanks

hatch · Post by **hatch** » Wed Apr 26, 2006 3:14 am

can anyone help me on this one? also, i see that people are recommending completely filling absorbers to improve bass trapping. would that be applicable in this case?

SonicClang · Post by **SonicClang** » Wed Apr 26, 2006 3:39 am

Anytime you see the term "sealed" in studio construction, yes, that means completely air-tight. Silicone caulk is the preferred method to acheive that.

knightfly · Post by **knightfly** » Mon May 01, 2006 5:12 am

Hatch, you need to update your profile to include a basic location - thanks.

The corner absorbers in John's plans are a quasi-helmholtz (slat) resonator - what makes these work is approx. half fill of 3 PCF rigid insulation, either Mineral wool or rigid fiberglass, placed up against the front slats along with an acoustically open cloth (front to back, it's slats, cloth, insulation) - The more insulation fill, the smoother the response (and the less important the slat width/spacing) - use the helmholtz calculator in this forum, and set the depth value to half the depth of your corner to see where the absorption peak will be.

And air tight in this case (since there's obviously "Holes" in the form of slots across the front) means that ALL the air getting into or out of the trap MUST pass through the slats, cloth and insulation in order to reach the inner cavity... Steve

valgaer · Post by **valgaer** » Tue May 30, 2006 3:37 am

Hi there!, a little question about the calculator, when refering to depth from wall in a corner trap it referes to the distance from the slats to the vertex of the triangle behind them?

Thanks a lot!!