Indeed - They are loud. ;) You can slow the fan speed down some and that makes a difference, but they still produce a lot of fan noise:

If you listen in this video of my homelab: https://www.youtube.com/watch?v=-b3t37SIyBs

I would say that more than half of the total 'volume' is attributed to the three Arista switches. They are quite a bit louder than the Ciscos, and of course much louder than the Ubiquiti.

I certainly would not have one of these next to me in a work area.

On the other hand, they are the cheapest way to get 40G! With DAC cables it can be really inexpensive.