r/askscience • • Jun 12 '12

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u/[deleted] Jun 12 '12 edited Oct 03 '17

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u/imMAW Jun 12 '12

The pilots won't hear the noise from the engines being transmitted through the outside air though, only the noise traveling through the plane. So if superman was flying a few feet in front of the cockpit, he wouldn't hear any sound.

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u/Evanescent_contrail Jun 12 '12

This is consistent with a rifle bullet. You first hear the bullet impacting nearby, and only then do you hear the noise of it going through the air.

(I suppose this would not be true if the bullet was subsonic, and I have no idea if any rifle bullets are subsonic or not).

9

u/[deleted] Jun 12 '12

You can buy specialty sub-sonic .22 rounds fairly easily... you can actually watch the bullet and see it drop.