I got an infrasound microphone but all it did was demonstrate that the hum I can (barely) hear (and that my partner cannot hear) is real... and that indeed it d

I got an infrasound microphone but all it did was demonstrate that the hum I can (barely) hear (and that my partner cannot hear) is real... and that indeed it doesn't go away when I cut power to everything within 500ft of my home (which I believed from my own observation, but wasn't completely sure of).