After a series of double doors and long, anonymous hallways, we entered a large, warehouse-like lab cluttered with test equipment. So our group stood in the concrete and steel room — quite sparse and utilitarian, not what you expect from Apple — surrounded by giant aluminum cubes (a few of the company’s 17 anechoic chambers used for radio testing), and a small army of Apple reps.
Ruben began by telling us that the labs used to be secret even to Apple employees — something they referred to as “black labs.”
He also informed us that there were 40 engineers working in those labs who were experts and held PhDs in physics, telemetry, and all matter of dark arts that allow the company to continually develop and test wireless technologies.
Props to @Engadget