Crazy Cat Lady
Is there any research to say how long that hum has been going on for, and any mention of its frequency?..
Consistent and very low frequency hum (3 to 7 hums per second) can be very damaging to people, especially at night time...Other sounds in peoples households can mask the hum, but our bodies are aware of it ..
From preliminary research, apparently it's been going on for a good while, since about 2009 or so. That's a long time.
My mother has heard this, but it was traced to the University of Southampton Campus, (Highfield, S'oton, UK). The University declined to respond meaningfully to complaints or requests for information from local residents, apparently.
I did not hear it myself, but neither did she while I was visiting.
My mother is a fairly extreme Karen, but in this case I have to sympathise that it was psychologically wearing. Her theory was that the building it was coming from, a multi-story office like afair at the end of a residential dead end, oddly enough, was part of the Physics department and 'they were running experiments'. The hum would start and last for several days. I didn't really follow the story after that, and I don't speak to her any more to ask for an update. This was about 2014 I think, +- a couple of years.
I keep hearing it at night (and have been hearing it for the last few years or so) and it is really annoying. Funny, that you should mention Southampton University, as I live on the other side of Southampton, so technically I shouldn't be hearing it if it was from that way.
Hmm... It's odd that they haven't responded to any complaints or questions from people. Also, if it's from the Physics department and they were running experiments, that begs the question on what experiments they are running. Must be pretty noisy experiments to be heard on the other side of Southampton and beyond.