Hardware for measuring and source locating a vibration noise in an apartment
There are accelerometers that can be used for vibration analysts.
There are inexpensive ones for under 8$ for micro controller projects like arduous they do work well.
Or you can spend more and get a premade usb device to measure the vibration.
I know in the past we had vibrations that showed up at a harmonic in the floor from motor driven pumps change the rubber pads and the vibration moved.
Since you sound like you like the data analysis the microcontroller project might be just what you want.