Journal: vibration harmonics noise inside desktops.

Hi I wonder if anyone ever tried to tackle casing vibrations of a desktop.
I made a silent desktop with only one fan (on the CPU) special aircooled power suply with no fan. Silent disks, but still.. i think these disks each have their own vibrations. And different vibration (wavelength's ) resulting in harmonic effects, and thus i hear buzz once every few seconds. (altough each disk seperate was a silent type too)

I wonder what would be a simple cheap way to get rit of it, other then putting my desktop in concrete. Perhaps something that is a solution specific to the harmonics problem.