This is my second post on this topic.
I searched the entire Wikileaks database, using “low frequency sounds”, “sound complaints”, “naval communication”, “Taos”, “Kokomo”, “The Hum”, “unexplained sounds”, and on and on for at least an hour. Absolutely nothing.
Given the frankness of its contents and the acute governmental embarrassment caused by Wikileaks, I am nearly certain that governments do not know what causes the Hum, or that it is completely unimportant to them.
Let me know if you are aware of any official documentation on the topic.