The mouse pads will work ok as isolation devices separating the vibration source from the transmission source but thats abut it. I wouldnt bother with the foam and cork, the only time youd notice their effect would be if you were inside the stand, it would actually sound pretty good in there depending on the type of foam and how it was arranged. A sound "absorber" will do nothing to stop soundwaves. Although some procedures can be quite complicated, my suggestion is, since the transmission source will most likely not be tremendously intrusive, wrap the entire structures exterior with a good grade poly sheeting to serve as a moisture protectant, then apply a layer of 5/8" sheetrock for mass and weatherstrip all doors and openings. Do this and I can almost guarantee youll sleep like a baby. You could take it one step farther and isolate the sheetrock from the stand using rezilliant channel separating the rock from the actual stud allowing for much less sound transfer to the outside. Really depends on how far you wanna take it.