A plethora of pseudoscience and wild conspiracy theories has the potential to drown out the serious work in this area. I’ve encountered seemingly serious people who have argued that the Hum is caused by tunneling under the earth, the electronic targeting of specific individuals, aliens and mating fish.
Given the need for disciplined inquiry into the phenomenon, in late 2012 I started The World Hum Map and Database Project. The database gathers, documents and maps detailed and anonymous information from people who can hear the Hum. It provides raw data for research in a strictly moderated and serious forum for research and commentary, while providing a sense of community for people whose lives have been negatively affected by the Hum.
…In my view, there are currently four hypotheses for the source of the world Hum that survive the most superficial scrutiny….”
Source: The Conversation