Without the sound, would you have known …
… that this was a NASA facility?
… how big it is?
… how many tons of air was in it?
… as a direct result of the above, how many tons of air from each floor of the WTC had to be pushed out in {1.07 second, then 0.44 second, then 0.34 second, then 0.29 second, then 0.25 second, then 0.23 second, then 0.21 second, then 0.20 second, then 0.18 second, then 0.17 second, then 0.17 second, then 0.16 second …} during the crush down of the {1st, 2nd, 3rd, … , 12th story} below the collapse initiation floor?
… that the chamber was built for testing of nuclear propslsion systems? (which I SERIOUSLY doubt to be true. I think it was highly likely built to test ICBMs & nuclear warhead re-entry vehicles during the exo-atmospheric portion of their trajectories.)
… the SEMINAL CONCEPT of this video: that it is an investigation of “the true nature of gravity”, rather than an investigation of “the nature of air resistance”?
… that it takes HUGE pumps three hours to pull the air out of this chamber?
… that the 2nd SEMINAL CONCEPT of this video is about Einstein’s Theory of General Relativity?
… that Einstein’s Theory says that “there is no force acting on the feather or the bowling ball at all?
… that the bowling ball & the feathers are, in fact, NOT FALLING AT ALL. That they are “standing still”?
No. Without the sound, you would have gotten NONE of that info.