External sounds audible in cockpit with engine running?

[ATAG_Snapper]

Originally Posted by SYN_Repent

in this example YOU didnt hear a thing over the engine sound, but YOU didnt have 8 browning .303's to fire, or 6 .50 cals firing at you, or other high performance aircraft engines screaming past you.

Good point. I've been on firing lines with, at different times, 7.62 or 5.56 semi-automatic fire on either side which was loud enough. Likewise, I've worked the target pits where even at 300 meters downrange the reports were also very loud. That's my only base for reference. I believe you would certainly hear, albeit muffled due to engine noise and padded helmet, automatic fire from wing-mounted guns and possibly fire directed at you from immediately behind.

I do NOT believe you would hear another aircraft's engine coming up behind you as we can in CoD. Another aircraft roaring close by, very possibly -- but I doubt very much from behind. This has saved my bacon a few times in CoD because I've heard a 109 on my six lining me up and I've broke just in time. But I've never heard a Spit or Hurri pilot claim he HEARD a 109 or 190 doing this. Have you?