How Wall and Ceiling Sound Isolation Works

Sound travels through drywall along common studs. Sound isolation, the most effective form of soundproofing available, works by “floating” a mounted wall over the studs using thick steel strips. These steel strips have a channeled shape and varying holes along the side. One “leg” of the steel strip is attached to a stud, while the other floats freely. The channels are attached to the frame of the wall (or ceiling) and the drywall is attached to the channel.

By using this layering technique, sound isolation works by creating a space between the drywall and the studs. There are no common studs for sound to travel along, stopping the transfer of sound waves. Another reason why sound isolation is the most effective soundproofing method is that the air space between the wall or ceiling is increased. A vibration isolation material can be installed in this air space to trap the noise sound waves. Also, sound isolation provides increased flexibility of the structure. Sound has a more difficult time traveling through flexible materials.