Want to know the most common ways our perps can know where we are through our walls, floors, and ceilings? By prompting Deepseek with the sounds I was hearing from my troublesome neighbour above I have learned this. The sound of a table or other heavy furniture scraping across the floor may be the product of a UWB (Ultra Wide Band) imaging system resonating with the floor as it takes an image. This sytem works on the same principal as acoustic sonar and can provide a very detailed image of the other side of solid materials for up to 10 meters or so. It can also track your heartbeat! I've yet to find example images of it being used in such a small scale because its currently classified but it's in use by swat and military as is no doubt the next method: wifi/rf imaging. Of this you can find example images if you do a search on yandex. The principal is also like sonar but it uses the transmission of everyday wifi waves penetrating through solid materials and returning to an antennae array. The waves are then analyzed and a color image that is somewhat fuzzy around movement is assembled. It's telltale sound is the creaking of ferromagnetic hardware (in my case my closet door's sliding hinge) as the wifi emf surge is produced. It will also produce readings on an emf meter for some time but if you don't have one of those you can tune an AM radio to static in proximity to the source and you will hear a bizzarre loud popping sound coming through the static. Both of these imaging methods are cheap and accessible to the average Joe with some education. The heavy lifting has already been done by academics years and years ago but they remain obscure probably to avoid mass-lawsuits and generalized mistrust. The age of privacy is over.