How do constant sounds from firing guns affect hearing? Do soldiers use some kind of protection?
The sound of a modern firearm discharging is loud enough to cause damage to the ear. This will result in hearing loss over time, it can also result in migraines and tinnitus. Hearing loss is the most common disability among US Military veterans. Basically, if you spend a lot of time around discharging firearms, without wearing ear protection, will suffer some degree of hearing loss.
Soldiers should be wearing hearing protection at all times, but, that doesn’t mean they always do. Same thing is true for people at a firing range. They should be wearing eyes and ear protection at all times, but you’ll see idiots who eschew them semi-frequently (at least, at poorly policed ranges. Some ranges will be a lot more careful about this for liability reasons.)
The US military issues dual use earplugs designed to filter out loud battlefield noises, which could cause hearing damage, while simultaneously not filtering lower volume sounds. I’m not sure how effective these are, as there was a major lawsuit back in 2015, regarding the earplugs produced by 3M.
Either way, if you’re using a modern firearm, you should be wearing ear protection of some kind. This isn’t as true historically. The actual problem isn’t the gun, it’s the propellent. Modern firearms use (variations of) “smokeless powder.” Smokeless powder dates back to the late 19th century, and had a lot of implications for firearms engineering. It burns more cleanly than black powder. This means there’s less fouling in the gun. (Fouling is residual unburned powder remaining behind in the firearm.) This means that firearms built to use smokeless powder cartridges can be far more mechanically complex. The downside is that smokeless powder gunshots are significantly louder than black powder ones. Which is why I’ve been stressing, “modern firearms.”
So, in answer to your questions: Yes.
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