BTW I guess this is the principle reason why one now sees a lot of red pilots flying with hood open. To hear better. This is completely *****. First the canopy open should increase drag and slow the plane. Second it should not improve sound radar. Instead sound radar should be removed entirely.

I do not see why it should be difficult to remove sound radar.

You just need a status evaluation of the player's engine such as:

if engine stopped then
>allow environment sounds
else if engine running then
>don't use sound samples of other objects than that of the player's game
end if