I saw someone do maintenance on a pile-driver while it was working right next to where the pile-driver hit. It must have been really effective ear protection,

I saw someone do maintenance on a pile-driver while it was working right next to where the pile-driver hit. It must have been really effective ear protection, but they didn't look so big. And never mind the sound, the whole head / body is going to be rattled by the vibrations. You wonder ... [edit] I looked up the data. 190db peak for this type (H steel piles)