If you want to stop machine noise from leaving your shop or prevent noise from entering your media room or bedroom, these simple and relatively inexpensive Isomax clips will help attenuate unwanted sounds, without taking up a lot of space.
You can install ’em on bare studs or over existing drywall on walls and ceilings. The clips attach to studs to isolate the resilient (furring) channel from the existing wall. You can add insulation between the furring strips before attaching one or two more layers of drywall to them.
The thick metal construction of the clips also prevents you from accidentally screwing the furring channel right into the stud, which could compromise the noise isolation.
You can purchase the Isomax clips for about $5 apiece at Residtronics, but there’s a $150 minimum order.