Today at 2:00 pm, I was inside a two story building, I was on the 2nd floor and I hear a fire truck siren take off the road for a mere 5 -8 seconds it was in front of the building outside about 18 to 25 meters away from me outside, I wasn’t wearing any hearing protection. It freaked me out. Then at around 3:15 pm I was driving home and stopped at an intersection at a red light, and across from me was an ambulance and it had its siren on for 10-15 seconds and it was 25-28 meters away from me, this time I was in my car with my headphones hearing protector on with a decibel NRR rating of 37db, it drove past me. Then I finally got home and went to sleep, I manage to sleep for a mere 4-5 hours, I wake up at 10 pm now with no ear pain, but a noticeable ringing in my left ear and I can’t go back to sleep because of it. How long until the ringing subsides and do I have any permanent hearing damage?
The dates I got exposed to loud noise last time to fire sirens was Feburary 28, and took me almost a week to recover, then I get this exposure today on march 10.