It works much in the same way as noise-cancellation in premium headphones and smartphones. A mic inputs noise from the cooler, speakers give out the same noise with a phase difference, this causes destructive interference between noise coming from the speakers and the cooler, and noise is reduced. The speakers are positioned along each of the two fin-stacks. The mics are just as discrete. Noctua stuck a mic into the test chamber with the cooler running, and visitors couldn't hear a thing, at least nothing that's louder than the morning crowds at Nangang, after the event has been opened up to the general public.
Noctua shows prototype of Active Noise Cancellation HSF
Posted on Friday, June 07 2013 @ 15:42 CEST by Thomas De Maesschalck
TPU got to see a prototype of Noctua's upcoming processor cooler with active noise-cancellation technology from RotoSub. the cooler consists of a twin-tower aluminium fin stack , with six heatpipes and a large fan between the two stacks.