I notice that someone was searching for info on Wi-Fi signals and QuietRock. My Wi-Fi router is in a room and all four walls are covered with QuietRock. I've had no problems. I use the wireless signal in other rooms and stream music from the QuietRock room to stereo speakers in another room. If anyone finds a data sheet on this, please let me know, and I'll link to it here. Meanwhile, since I can't find any videos to illustrate Wi-Fi and soundproof drywall, here's a quick video from Geek Slant on installing double-drywall with Green Glue to block a neighbor's TV noise.