noise mitigationin ductwork (1 Viewer)

[Matt Praissman]

Hi, y'all...got a problem
Here in the frat house I have a duct that's a shared air-return for the next room over. It's about six feet long, with air filters and grilles on each end, and a shared return duct in the middle that goes up to the roof. Being that this is a short duct, a fraternity house, and we're all loud, it's quite the medium for transmitting noise from one room to another. Anyway, the guy on the other end of it and I want to pick up some of this 'sound control board' we saw at Home Depot. It's in 4x8 sheets and it's a dark-brown felt/wood composite or something. We want to build a baffle right in the middle of the duct where the up-duct is, effectively splitting it into 2 discrete returns and stop the noise from going through the duct...any thoughts?
Matt Praissman
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[Matt Praissman]

Eek. Sorry. It's easy to post on other forums :

 

[Mac F]

it would probably help some, but don't expect perfection. You might also line the duct with fiberglass, if it is an older building with metal ductwork, this would be worthwhile; be sure not to overstuff the duct and block air flow
i'm glad you posted, i had read about sound board, but didn't have any idea where to get it