Hey. I posted about this as well in here. There is an online map where you can pin your location of “the Hum”. Heard it for the first time a few nights ago, never heard of it before, but was woken up to it and couldn’t go back to sleep. Such a bizarre thing.
Apparently it became noticable in the 70’s. A community in England was a focal point of the sound (Bristol) although it’s been heard world wide. Dr’s at Cambridge Uni have done studies on it and have found no conclusive evidence of where it’s coming from…just theories.
Out beyond ideas of wrong-doing and right-doing, there is a field. I'll meet you there. - rumi