Update: Thanks for the advice. Particularly, they may not realize they are loud. That was something I hadn't considered. I knocked on the door, and no one answered. I know someone is up there, because they walk like a dinosaur. Based on their steps during the day, I imagine they are quite heavy set, know how loud they walk, and could be embarrassed to open the door. I will try again later, and hopefully a positive update will follow.

But, if this turns into a game of noise, I have a solution: make them louder. I have access to an ultra sonics lab. They'll be loud enough I won't need to call in a noise compaint. The rest of the complex will come with torches and pitchforks. Though I believe this can be solved diplomatically.