Black Noise

Into the wilderness, mystery bound
Several there go into the mist
With food and provisions, adventure found
Seeking the olde stoney circle of round...

But what now pervading
Omnipresent sound
More felt than heard
From sky to ground...

A trinary figure blots out the stars
Blacker than night, come from afar
Vibrating bone, curdling blood
Invisible rebus, strangest of tone...

With no zephyr a-blowing, no Santa Ana wind flowing
Forest so still, no creature a-stirring
As it has come, so it has gone
I bid you farewell, enigmatic one...

...Personal experience of the omnipresent 'black sound' more felt that heard on a hike. Emmanating overhead, eventually surrounding the area. Black triangle variation, perhaps a secret governmental project sometimes seen in isolated locations. Perhaps A variation in stealth and/or drone technology...