Your tiny electronic vibrations in your player likely isn't going to be in a frequency you can hear, but I doubt that would convince you. The science behind coupling is to make the entire system as heavy as possible -- with more mass, the resonant frequency lowers. This should actually be harmful on your audio rack unless your rack is weighed down with a hundred pounds of sand (think metal speaker stands) if the resonant frequency is within audible range.
Decoupling -- viscoelastic material such as sorbothane actually absorbs some of these vibrations and turn them into heat. This is mechanical engineering 101, for more info, look up the "spring-dashpot" model.
I think in the medical, HVAC, etc. industries where vibration must be stopped to reduce noise or because of sensitive equipment, decoupling is most likely to be used. Coupling will pass vibrations onto other components where it will be harder to control; the idea is the control vibrations at the source, and that means using springs and hydraulic shocks in the worst cases to turn as much vibration into heat as possible.
Decoupling -- viscoelastic material such as sorbothane actually absorbs some of these vibrations and turn them into heat. This is mechanical engineering 101, for more info, look up the "spring-dashpot" model.
I think in the medical, HVAC, etc. industries where vibration must be stopped to reduce noise or because of sensitive equipment, decoupling is most likely to be used. Coupling will pass vibrations onto other components where it will be harder to control; the idea is the control vibrations at the source, and that means using springs and hydraulic shocks in the worst cases to turn as much vibration into heat as possible.