Imagine the sound of a mosquito, except lower pitched and electric/mehanical and wherever I turn to, it’s on the same “side” – to the left. That should indicate it’s “in my head”, right? Actually if I cover my ears I stop hearing it.
Whatever it is it woke me up at 6 AM and wouldn’t let me sleep again. Probably because of this noise I started paying more attention to electrical background noises in the house. The fridge sounded very loud. The cable tv box made a new noise I never heard before. I went downstairs to shut the mains down and they all went away except that electrical/mechanical “mosquito”.
I think I’m going to get some ear plugs…