I have an aliexpress one. definitely loud... One of those things that if you have people over, you turn it on for the cool factor, but if you're playing it yourself, you'd turn it off.
One thing I was thinking of is getting a plexiglass case for it. The case itself should block some of the sound, and if you get a round one, the air should quickly be moving at the same speed of the fan, so would probably cut out that noise.... but then you lose a bit of the cool factor since it wouldn't really seem like it's floating in air.