*** Posted by run ***
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Does it happen in the same way around mach 1 and the "sonic boom" (the boom appears quite sudden and is hard to pass (while it dosnt rise in level thereafter)???

Kim Nielsen.]

Most of the noise in an f-16 is engine or ECS (Environmental Control System) related, so you don't hear much of the airnoise. Even though drag rises around mach 1 you don't notice passing mach 1 at all in a modern jet. You only notice a small flicker of the altimeter and the VVI. You can't feel or hear passing mach 1. The sonic boom can only be heard on the ground and not in the jet producing the sonic boom.
It is very easy passing mach 1 in an f-16 and some pilots have even done it by mistake when trying to escape another plane etc (In Denmark we are not allowed to fly faster than mach .97 over land due to the noise)

run