Last week, my friend and I were deer hunting in SE OK (near Honobia, BTW). Two nights, something was right outside our tent making a low humming, mumbling, kinda chatttering sound. The sound didn't start until after we had turned out the lantern. We have camped in the same exact spot for 15 years and never heard this sound before, although we have had strange experinces ( which I could elaborate on). Just curious if anyone else had heard this before?

What my friends and I heard, would be something more like a long, wailing type of moan. It started low in pitch, reached a higher peak, and then went back to the lower pitch...not exactly like, but similar to what an air-raid siren does.

Oh yeah, the volume intensity was amazing. WAY louder than anything I think a human could ever do!

Raider:
Please check out my encounter here. Also, there is a link on this thread (weird sounds) to a soundbyte called the "Ohio Talker". Listen to it.
BSF

Raiderred, you might want to get a copy of the Sierra Sounds cds and listen to those also. I still haven't convinced myself that these recording are genuine, but there are sounds on them similiar to what you are describing.