I've really been struggling with an odd phenomenom for about a year and didn't think to ask here until I saw a similar post. There is a steady low hum - like a gas plant or factory - sounding in my head. I figured it had something to do with the nearby feed store, but that's been ruled out. They only grind feed at certain times during the day and I hear this noise is 24/7. I thought there might be a bad transformer, so I called the electric company and they checked it and said it was fine as well. I figured maybe there was a random motor running so I turned off all the power in the house, but I could still hear it. The strangest thing is my husband nor anyone else can hear it. I have not been diagnosed with lupus, but I do have most of the symptoms and I suffer from chronic migraines, fibro, and a few other miscellaneous things. Has anyone else experienced this? It's more of a low vibrating hum that goes in and out like an oscillating fan.