Hearing loss is cumulative.
I sincerely wish that I would have worn more hearing protection in my youth. I used to shoot competitively, operate power equipment, work around jet and piston aircraft, drive loud cars and motorcycles, and, unbelievably... listen to really loud rock music.
I never really noticed it. However, when I started working at the newspaper in 1987, one of the first things they did was test my hearing to get a baseline. I already had significant, measurable hearing loss at age 26. Fortunately, they require hearing protection in all of the production areas and I took advantage of that for the next 30 years. And, they tested hearing and recorded the results every 2 years. So I could monitor any further losses. They were minimal from that point on, but the damage was already done. From that point on I always wore hearing protection at work AND at home when doing anything with elevated noise levels, even if only for a brief amount of time. I have over the head headphones and several bags of foam ear plugs in convenient locations. They are simple to use, you can hear noises around you, they don't cause any discomfort, and there's really no excuse to not use them. Just like safety glasses.
I'll tell you this young folks... once your hearing declines, it never comes back. And if you don't continue to protect it, it'll only get worse.