By ear, I can tell whether a distant explosion came from a professionally manufactured firework or a bootleg version put together by unsupervised kids with access to the assorted ingredients.
Sonny can do this as well, with one small difference. Even though our mutual interest in the loud arts has caused a surprising amount of deafness in both of us, we have separate fields of study.
As a former gunner’s mate in the Navy, Sonny is far better when it comes to the noise of actual military ordnance. He can, for example, tell the difference between the boom of a 40 mm round and that of a 60 mm mortar from a mile away.