Author Topic: Deflecting noise in an a.c. unit.  (Read 4294 times)


  • Guest
Deflecting noise in an a.c. unit.
« on: January 11, 2009, 02:09:02 AM »
Dear Soundproofers,

Great site. Very informative.

I recently moved into a new second story garage apartment which is cooled by a wall air conditioner unit. And that's the problem.

When not in use the unit is like a sieve, allowing all kinds of noise into the apartment: traffic, neighbors, planes overhead.

Running the fan is mildly helpful. But I'd like to deflect some of that outside noise, if possible. One of my neighbors has a metal canopy/hood over his a.c. unit that covers the top and sides, but leaves the bottom open. Would such a canopy block some of the unwanted noise? Any other suggestions?




  • Guest
Re: Deflecting noise in an a.c. unit.
« Reply #1 on: January 14, 2009, 04:19:52 PM »
Yes, a hood will help a lot.  Line the inside surfaces of the metal with closed cell vinyl nitrile foam to absorb and block sound.  There is good info in this article:
You can close off the bottom as well but be sure to allow for any moisture/water to drain outside.