If anyone wants to get his printer more silent, I can recommend selfmade silicone vibration-dampening feet for your printer.
I did make some, out of shore 35 - silicone and, oh boy, it’s good!
http://renedruckt.blogspot.de/2016/03/vibrations-entkoppelnde-fue-fur-den-dice.html (it’ german, but it’s got many pics )