I got to say that these sounds from the various locations really is the only thing that has scared me. I have not heard them where I live, thank God. When I listen to them I have an overwhelming sense of doom. I think it is the unknown factor as well as the sound itself that just freaks me the hell out. Hard to prepare for what this may indicate, too many options, and none seem to lead to a clear conclusion at this point. This is one doom topic I do not even discuss with friends and family, don't want to creep anyone out.