sound transfer through return air in door grill
sound transfer through return air in door grill
(OP)
I have built a sound proof wall, the wall works great. the solid core door has a 12 X 12 grill in it for return air, I need to make the door sound resilent without losing any substantial amount of air.Is there any type of sound baffle that will go in to a 12X12 grill.





RE: sound transfer through return air in door grill
I lined the ducts (formed by the floor joists)leading to the return air grills with several inches of regular old fiberglass insulation, with a chamber a foot or so deep at the end. I think you need a long, line path from your grill.
http://www.soundservice.co.uk/Simple_Baffle.gif
RE: sound transfer through return air in door grill
The door needs to be solid, and you get your air someplace else.
RE: sound transfer through return air in door grill
you need to say what frequency you need to attenuate and by how much, and what air flow rate you need through the grill. As Rob says, it s probably impossible.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: sound transfer through return air in door grill
RE: sound transfer through return air in door grill
Check out a ASHRAE Handbook - Systems volume.
- the Sound and Vibration Control chapter.
See your friendly HVAC engineer or an engineering library.
The answer will probably be a lined elbow and ductwork attached to the door.