Since it is based on the NH-D14 heatsink which sells for around £65, this new version is going to be very expensive.

Source: The Tech Report

Noctua and RotoSub are working on a CPU cooler that employs active noise cancellation in its pursuit of silence. We saw an early prototype demoed at Computex last year, and an updated version was at this year's show.

The noise-cancellation tech uses a magnetic field to generate minute vibrations in the fan blades. A microphone takes in the noise produced by the fan and then tunes the blade vibration to cancel it out. At least in the video, that approach seems to be effective at masking the fan hum, which admittedly seems a little on the loud side for a modern spinner. You can read more about the design here.

The cooler shown in the video looks a lot more polished than what we saw last year. It sandwiches a single, shrouded, 140-mm fan between a pair of radiator towers fed by six heatpipes. The radiators are shaped to avoid bumping into taller DIMMs, and the microphone is situated on the side of the radiator. Although the design is "almost completed," the finished product isn't expected to hit mass production until the middle of 2014.

Noctua doesn't mention a price, but we were told last year that adding noise cancellation would probably double the cost of the fan. The R-ANC will likely be priced in the same realm as exotic water coolers. Fittingly, perhaps, Noctua is also working on a noise-cancelling fan specifically for liquid cooling radiators. The 120-mm radiator fan is at an "earlier development stage," so I wouldn't expect it to be available anytime soon.