1994 Aerosmith concert in Budapest. Until next morning I could not hear people talk only when they shouted at top of their lungs. Ears ringing for three days afterwards.
Loudest noise ever: Airplane taxiing at Petrolina airport in Brasil (1989), I was on the balcony watching it, and as it turned it faced me and I was exposed to the jet engines noise for a split second. It felt like the world exploded, I could not hear anything for a while afterwards. Took about a month until hearing returned to normal. That was about 160dB....
Using ear protection regularly: when going to concerts, movies, while driving at also at work! Even though I work in a lab / office, the AC in big buildings is loud enough to warrant noise protection.
Also, I have avoided gear that cause fatigue like Justinian's plague... (not just any plague, but the granddady of all plagues.)
My hearing is fine out to 20kHz, and I'm 45. Also, it's quite a bit more trained when I was 20 - I hear much more than I did when I was younger. (When younger, I was not aware that I can hear any higher than 17kHz! It took training to identify what the super highs sound like.)
Four critical factors were there to prevent harin decline, and instead have improvement:
1. Protect from loud occasional music, and when exposed, TAKE VITAMIN C afterwards. Your ears will recover from most damage, but they need the fuel to do that. No fuel, damage is permanent. Vitamin C available - no oxidative damage to neurons.
2. Even more important: protect from repetitive constant noise. Hours and hours of 70-80dB noise exposure is just as bad, or even worse than occasional 110+dB.
3. Crucial: if you notice fatigue from stereo, it is your brain telling you to immediately stop, Also, you need to change your system to non-fatiguing. Me and my friends have experienced hat fatiguing stereo is the winner among all kinds of noise exposures to spectacularly your hearing prematurely.
Good luck, and happy concerts! ;
PS: The Die Antwort concert in Honolulu (about 2018?) was freakin loud as well... my most recent exposure to crazy levels of sound. Was totally worth it though.... lovely band!