Remeber blackhawk down?
Grimes:
Why aren't you shooting?
Waddell:
We're not being shot at yet!
Grimes:
How can you tell?
Waddell:
A hiss means it's close. If you hear a pop, then
Waddell:
-
now they're shooting at us!
If you can hear a bullet, its very close to you.
you cannot hear a bullet say 10 feet away, not even a hiss.
What you will hear, is a whack, as the bullet impacts, then a boom, from the rifle.
This audio stuff is highly misleading, what they say is the supersonic retort, is actually the impact, which is usually very loud.