Last Thursday night (February 16) at around 11:00 PM, I noticed a sound similar to a diesel engine idling that wouldn't quit. I found it very disturbing and after checking around the neighborhood and my own property for hours, I concluded there was no detectable source. I even went to another neighborhood to a friend's house with the prospect of being able to sleep, but low and behold the same low, rumbling frequency was there as well. The following day I went online after being told about a phenomenon called the "Taos Hum." Apparently people in Taos, New Mexico as well as others around the world who are very sensitive can hear this "hum," which many believe originates from the government or the Navy signaling submarines.
If there are those who have heard a persistent, low hum of this nature, please offer your comments/info here.
Thank you, Mannaray