Drafty run down apartment. My entire wooden floor is shaking. Spoke to the neighbor about it.
Hot take: subwoofer in bad apartments should be illegal. At least concrete might absorb the bass better. I lived in a building with this rule once.
Slum lord doesn’t do anything in general about building maintenance
Ear plugs and soft pads under the bed feet (to help with vibration). It’s not gonna solve the problem 100% but in my experience I can sleep virtually anywhere with earplugs (provided my sleeping position is stable).