Edit: Noise level. It's pretty quiet. The camera/mic was two feet from the machine in the video. The fan runs constantly, but it's unobtrusive. I don't even notice it most of the time. I'd guess 5-6 db above ambient. That is a guess, I can't measure it.
As trivial as the actual db rating is, if you have or know someone with a smart phone there are a bunch of free apps that will measure the sound level.
I could measure it off the mic with a plugin for FLstudio, too. But it's wildly inaccurate. I used to have a proper meter, and I've never seen the software ones come even close. I'm a singer, so on that issue I'm actually less ignorant than on reviewing this damn miner
I do have an old smartphone. It's pretty much shot, though. I use it as a web browser, cuz the mic and speakers are fubar.