The Hum.

It has been around for longer than I can recall. So many theories.

Is this natural, or created by some being(s)?

Either way, what is causing this phenomenon, which only a small percentage of people experience?

Sound is a very strange sense in some ways.

For one thing, all the "internal sound" of breathing, blood flow, heart beats etc generally gets filtered out unconsciously, even though the ears are clearly picking up the audio as measured by hooking up a sensor to the nerve ends firing.

I suspect Lyn Buchanan has some sound based reason for setting up on a remote ranch in New Mexico. Help with the people sensitive to that sort of low noise level.

Apart from that I got no data really. Sorry.