It is.
While I was on the .45 familiarization range at Lowry AFB, the instructor had to pause several times because of an extremely loud "foghorn-like" noise emanating from a bunker a couple of hundred yards away.
He explained that the sound was was "only the armorers remotely firing test bursts while they are 'tuning up' 20mm Vulcan cannon".
Firing at 6,000 rounds per minute, (100 rounds per second) it was producing a continuous 100 Hz tone -- composed of very loud individual explosions...
Even at that distance -- wearing hearing protection and and shielded by the bunker, I could feel the vibrations through my entire body. No wonder that maintenance troop -- only feet from that cacophony -- was, “...suffering from noise related effects”!
I don't know about the F-16, but the A-10's 30mm GAU-8 is equipped with a safety switch on the nose gear strut -- so that the gun is "safed" while the weight of the A/C is resting on the ground.
Obviously, that Vulcan wasn't "safed"...
TXnMA
