Ear-plugs don't help with low-frequency vibrations like that from an elevator. The manager of my last building would disable the elevator from midnight to 6AM w

Ear-plugs don't help with low-frequency vibrations like that from an elevator. The manager of my last building would disable the elevator from midnight to 6AM which provided some relief. Noise, vibration, light pollution (e.g., excessively bright white LED street lamps) is something more people will deal with as urbanization increases. Also, when you have a lot of neighbors in close proximity someone will keep you from getting sleep. Whenever I meet a grumpy neighbor I now assume they are sleep deprived.