An audio lab found in Building 87 on Microsoft’s campus in Redmond Washington happens to contain something unique to the world. An anechoic chamber surrounded by acoustic correction that absorbs all (possible) sound, and brings the noise level of the room to a record breaking -20dB (decibels).
Confirmed and acknowledged by the Guinness World Records, it is the closest place on earth to the unavoidable noise of Brownian Motion (the sound of particles moving through air in the room), which sits at -23dB. The room is (can be) used for the testing of various Microsoft technologies such as Cortana as well as noise feedback of hardware (ie, phones, tablets, etc).
Now if they could run a few computers through to help get the noise from the fans to a silent enough level so that home and business video rooms/theaters could enjoy that extra kick of silence in-between scenes, I’m even more sold on how cool this is.
Check out the following video by Microsoft to see how they did pulled it off, and how it was measured.