You need to take into account what is your background and then subtract it from it, eg. record noise with console off and then on.I checked and my console is between 53 and 65 dB with my phone right beside it. This is both in game and out of game.
Interestingly enough a report showed the quieter fan being 35dB and the louder one 45dB.
This leads me to think I have the vibrating issue with the housing. Going to put in some o rings to try dampen it and will report back.
Anyone else get a dB reading out of interest.