Resilient channel is a specially-formed, metal device that,
when used to hang drywall (instead of attaching the drywall directly to the wall
studs or ceiling joists), significantly reduces the sound transmission of the
wall or ceiling system. The channel material is secured to the studs and drywall
is secured to the channel - providing a break in sound transmission through the
wall.
Resilient channel for sound control is not effective if
attached to sheet materials, such as drywall. It is also important to use the
right length screws, so they do not penetrate into the wood framing.
Just a few screws into the wood can undermine the resilient
connection and substantially lower the STC and IIC ratings.
