I can hear the most minute of sounds. Even my kitten walking around downstairs (on a marble floor).
On the other hand, I hear way too much noise and have great trouble understanding speech because of it.
Just last week, it allowed me to hear the spinning of wheels stuck in mud a couple of klicks from my house, while I was eating dinner. Apparently someone got stuck in one of the muddy holes caused by the rains, in the middle of nowhere. Dropped him off at his place, and got the car freed the next day.