Sorry I am not native so it's difficult to find information about it and I can't put a name on that special effect.
In movies sometimes you have an explosion and the soldier is lost in his own thoughts or lose consciousness and you can hear a continuous ringing in the ear, and the background sounds are blurred and the image is a bit in slow motion.
Here's an example in the famous "Saving Private Ryan" movie :
Is there a particular name in the movie industry (or maybe in the military dialect ?) to refer to this very specific effect/state ?