Some drummers who live in apartments build drum kit risers for their electronic kits to help control the noise going into the floor. This helps keep the neighbors below you a little bit less angry.
Here’s one approach, this shows the building process that one guy took.
I thought this looked like a pretty thorough approach, and fairly simple. It’s using tennis balls, which is a pretty good approach to keeping noise off the floor. Here’s another example of using tennis balls in a drum riser.