Goebekli Tepe? I never heard of it before, but I found this video at least interdasting to listen to, and the guy sounds like he knows what he's talking about.
Graham Hancock? I've never heard of him either.
I usually think it is from weather and tectonic manipulation technology that causes the earth to ring at supra low frequencies that our ears can pick up as a ringing…kind of like striking a tuning fork and holding it close to one's ear.
When I get a ringing, I pay attention to earthquake events.