Name: Muffler Upgrade
Suggestion: This item goes in the upgrade slot of a machine and reduces the volume or eliminates entirely the operating noises of machines. Although there are hackish ways to do this, and one can always reduce the volume on one's computer or Minecraft (at the cost of reducing everything else), it would be nice to have a legitimate way to do this, and in a selective manner. Some machines, especially when they have a few overclockers in them, have extremely irritating noises, and there may be cases for whatever reason that one would want to have a "stealthy" base (or reduced environmental impact base, as I am planning with mine).
Recipe: 8 wool around 1 wooden chest gives 1 Muffler Upgrade (the idea being that the chest contains the wool, and the wool is the sound-proofing. Wood, too, has some sound-absorbing ability of its own.).