Silence at the rendezvous
Yes, silent. A brand that lives up to its name! Of course, at maximum speed you can hear a bit, logically, especially if there are a lot of them in the tower, and you're doing intensive 3dmark tests.
But they never run at maximum speed for long, as they're there to cool down, and when it's cooled down a bit, well, they run slower again, and you can hardly hear anything, as the pwm system manages speed according to temperature.
Don't be fooled by the fact that all high-speed fans can be heard to a greater or lesser extent. With be quiet it's less!
I'm looking forward to the restocking of the 140mm 1200 RPM.