Apparently you missing the obvious just like him.
He's testing fans the diy market runs around 600 to 1200rpm (maybe some exceptions run a bit higher). Why does 99% of ppl run those speeds???
There's hardware electrical noise, there's airflow turbulence noise provoked by crossed paths and obstructions, and there's the fact, the me, you, and the other guy above have 5-7-9-12 fans in a setup, sometimes more......
Nobody cares about checking manufacturers claims, we already know that MOST of them are either lies, or best case scenario, misleading because of chery picked units, or misleading ways of testing for that matter.
If I'm watching a review of a guy with a longiwn machine and an anechoic chamber, I'm interested how the fan does in the range of RPM most ppl run them. Not out of it.
Have you heard 4 nf a14 running at 1140rpm? I have a setup like that at home.
You can hear that PC from the next room.
I can clearly distinguish them from ambient noise at 1m distance running half that RPM.
And my hearing is far from perfect.....
He has the capability to make very precise measurements, so one way to increase the range is to measure noise closer. Yes measurements wont be comparable with manufacturers claim or other third parties, but who cares? He's a third party......
And I'm so tired of seeing the same "brain turned off" logic, that if something is bellow the noise floor, is somehow automatically inaudible.
Your ears and brain are not a fking mic. Just because a mic cant pic it up, doesn't mean you can't distinguish it from the ambient noise.
