Main Question or Discussion Point
What exactly is the noise?
I think this would not be efficient enough to be audible. The currentNam_Sapper said:The hum is usually a 60-cycle hum, and is probably caused by the physical motion of the wires or metal coverings on transformers, instigated by the changing EM field, exerting a force on the iron/steel. I expect this is acts like a very inefficient speaker.
On powerlines in the air, there is probably a phase difference between powerlines widely spaced or on different circuits causing the air to act like part of a giant electrostatic speaker (in the hearing range).
OMG. brilliant quip. How did I miss it?faust9 said:Because they don't know the words.