There is another way to deal with this. I keep a pair of electronic ear muffs laying next to my 357 Mag. Given time to put them on and turn up volume, they will provide two advantages: 1) I will hear much better than with my already degraded ears and 2) I will not even hear that 357 mag when it goes off.
These electronic ear muffs have already been nice to have a few times, when I heard noises I could not identify and which were less loud than someone busting down a door. I was able to identify sounds and verify that I was correct. Nice to be able to do that!!
Niklas