Strong bass causing buzzing behind the wall


I've got a spot in my new listening room (in the basement) where there is a drywall wrap around some hvac ducting along one of the side walls at the ceiling. The drywall is installed over thin aluminum framing. When I play music with strong bass (e.g. Jennifer Warnes "Way Down Deep"), I can hear buzzing in the wall. I set up REW to generate a sine wave around 50Hz and I can easily cause the buzzing. 

The good news is that pushing on the drywall in a particular place will cause the buzzing to stop. So I'm trying to figure out the best way to fix this. I was thinking of drilling a small hole and spraying some expanding foam insulation. Something like this: 

https://www.homedepot.com/p/GREAT-STUFF-16-oz-Big-Gap-Filler-Insulating-Foam-Sealant-Quick-Stop-Straw-99053938/207050533

But I'm not confident that this will stop whatever is vibrating, and once this stuff is in, it might be harder to deal with the issue another way. 

Any ideas? Thanks.
128x128jaytor

Showing 3 responses by 213runnin

Jetter, the idea that this type of product can bend 2 x4 studs has not been my experience.  Are you speaking from experience, or just going by what you've read on the internet?
Maybe they just did a poor job of installing, I really doubt that the foam could bulge 2x4 studs.
I've used this foam insulation spray on different occasions, and I'm going to have to call BS.  It does not exert pressure when it expands as jetter suggests.  Look up the "Great Stuff Pro" ad copy and you'll see they specifically say it, "expands to fill gap without distorting frame" for windows and doors.

I'm afraid that his window installers either didn't know what they were talking about or were covering for poorly constructed windows.  Or they were poorly installed.  

http://pdf.lowes.com/useandcareguides/074985005169_use.pdf