View Single Post
Lt. Commander
Join Date: Dec 2007
Posts: 120
# 7
04-13-2012, 10:26 AM
Actually, I have heard of this before.There was a big write up on it. It was indeed a DARPA listed and US Navy funded project involving the transmission of very high and very low frequency sound over long distances through bed rock to communicate with submarines. The object was to create a means of coommunication that was uuninteruptible in case of nuclear war. A lot of people have heard it and suffered from it over time. Has to do with rock formations and make up in some areas. Depending it can sound like it comes from overhead instead...