Quote from bighog:
The problem: Desktops sit right near, under, etc your desk. They make noise, fans hard drives, scsi etc. I run 3 desktops when the mkt is open, the noise adds up, no real problem but i was thinking of having the pc's in another room AWAY from the trading spot.
Some time ago I saw a noise reduction kit for PC reviewed. Apparently it was reasonably effective. Included things like some special material to glue to the inside of PC case to absorb sound, damp resonances etc. I forget where the review was. You can probably google for it.