posted on May, 30 2015 @ 12:47 AM
, you said the sound was recorded in southern/middle Tennessee. Would that be anywhere near Huntsville, AL? It’s been awhile, but
I’ve done some contract work (software development) in 2 different locations in that city, and the sound was very similar to what I heard there.
First, I did a few jobs at an engineering research and development firm in Huntsville that did a lot of contracting for NASA, Aero/DoD and the nuclear
power industry. Their work entailed a lot of specialized engineering, component testing, scientific and technical services to the federal government,
as well as private industry. Part of their testing included a lot of shaking and blowing things up, as well as determining the upper limits on these
HUGE high pressure release valves used in nuclear power plants. When they conducted the high pressure tests everyone in that town knew it. It made
buildings shake for miles around, and the sound was unreal. The sounds on your recording were a lot like the sounds generated by these tests. However,
none of the ones I witnessed lasted for 30 minutes. 2 or 3 maybe, but not 30 minutes.
Second, I also did a number of jobs at the Marshall Space Flight Center in Huntsville. Amongst other things, they do a lot of work/research on exotic
space flight propulsion systems. From time to time, not often, they would conduct live outdoor tests, and some of those suckers got deafeningly loud.
Here, as well, never for 30 straight minutes.
I just wondered, if atmospheric conditions were just right it might be possible for some of these sounds to be audible into areas of southern
Tennessee. I recall 1 test that could be heard as far away as Birmingham, which is around 90 miles from Huntsville. Like I said before, though, 30
minutes is an awfully long time.
Then again, who knows? Maybe it’s just the New Madrid Seismic Fault getting ready to rupture...