To further "shift the scales" the number of shots and what round is being shot, how close the muzzle is to your ear(s) and the size and make up of the enclosed space.
The gun that "went off" in Baldwin's hands (to date HE refuses to admit HE fired it) was a .45Colt. The movie setting was the old west. While no "official" findings are released yet, I'm certain the round that fired was subsonic.
There was only one shot fired. The reports about the set mention "pews" so I believe the set was a church. Old west frontier town churches tend to be moderate to largish size rooms made of wood. These things make a difference in the amount (and intensity) of the hearing damage.
One large bore subsonic shot in a wooden room, compare that to rapid fire 9mm (or other generally supersonic pistol) or full auto fire from SMGs or AR/AK class weapons in a stairwell, hallway or small room where the walls are brick or concrete, or on board a modern STEEL ship. These things are very frequently
simulated by movies and tv.
The number of shots, the intensity of each, and the reflectiveness of the surroundings makes a difference. (but not on the screen, it seems)
I don't doubt Baldwin was on his cell phone "a minute later", I also suspect he was using the phone held to whichever ear was working best at the time, and I expect he was speaking louder than usual.
And, I believe, if asked, he would deny that...
many, many years ago I was once in the back seat of a Mustang when the moron in the passenger seat fired a 357 Magnum out the open window. No warning to the rest of us in the car. It was literally stunning and briefly painful and voices had to be raised to get past the loud ringing of the ears.
I found a different group of people to hang out with, as soon as could get out of the car. people who do that kind of thing are NOT people I want to be around, ever...
I make allowances for young, dumb and seeking excitement, but NOT for doing stupid..stuff with guns, ever.
It was a long time ago, and I was young and dumb, but I knew not to do that, at least. If it happened today, I would probably smack that dumb SOB with my cane...at least ONCE!