This excellent analysis from Benn Jordan requires another look at "The Worldwide Hum".
The Hum is a name given to widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise audible to some but not all people. These hums have been reported all over the world for many years, yet there has been no conclusive understanding.
For more information check out the website: The World Hum Map and Database Project
Video from Benn Jordan
The Worldwide Hum: The Controversial Sound Only 2% Of People Hear
"Since the early 1960's, an increasing number of people have been hearing (and feeling) a sound causing everything from annoyance to psychosis to death. We have a deeply objective look at what could be causing it.
0:00 - Intro 2:32 - History 4:37 - Taos Hum 8:01 - The Outbreak 14:09 - ELF Transmitters 15:50 - Natural Causes 17:34 - Infrastructure 19:12 - HPNG Pipelines 26:06 - Methodology 27:38 - Conclusions 29:00 - The Mental Health Toll 31:15 - Wrap Up" from the video introduction