You don't get it, do you?
The manufacturer's structure is under laboratory conditions but not in the real structure.
But hey, you're the only one who thinks our tests are wrong, it's extremely funny that we even test prototypes for manufacturers before they go to market. That's probably because our measurements don't match - you're right, everything we measure is wrong.
No kilometre long text will help you if you don't understand our measurement setup.
and you also don't understand that dba is not what you hear every fan has its own characteristics WE MEASURE WITH A MEASURING MICROPHONE WITH CALIBRATION AND ANALYSIS PROGRAM THAT CANNOT BE FAKED!!!! TAKE IT
And no, the honeycomb shape is not built into the dBa measurement and is this a joke? you really don't get this box, it simulates the construction of a case with e.g. filters or obstacles in front of the fan.
The honeycomb grille is to direct the airflow and even a company that manufactures fans and cooling units recommended this honeycomb to get the right and correct values.
you write things here but have no idea what it's really about, just read the other articles through our fan tests and you'll understand.
Why did we already have prototypes from be quiet of the Silent Wings 4 with us almost 2 years ago? right because our measurements are completely wrong.
Why do manufacturers ask us for our opinion on what can be optimised? right because we measure wrong.
also what you write about the foam is absolutely nonsense if the fan hums just a little bit due to a vibration, then without this foam the whole box hums.
The box is rubber-mounted and the device itself, the mounting brackets, have been changed.
You still don't get what the honeycomb is for, do you? It directs the air to my meter, without it the measurements are wrong because the air is distributed on the outgoing side in the chamber.
and that is exactly why the box was calculated to cope with 140 and 120mm fans.
As far as the dba is concerned, manufacturers measure from a distance of 1 metre in an anechoic chamber.
If you see this as a real condition, you are simply blind.