@Zora,
I understand why you are asking this, I was desperate to find an answer for that as well when my T started in the beginning of Dec 2015. Truth is that there is no accurate answer, even if you ask doctors, depending on who you ask you'll get different answers. My ENT told me that I should not be scared of regular everyday noises, even if they sometimes appear to be loud. Only protect ears at concerts, cinema etc. No need to stop living my normal life and just beware of loud environments like I would have done without T (if I did it from start I didn't have to be here with T of course, lol). I've attended cinemas three times and a bar (Super Bowl Sunday!) with ear plugs during the whole night or movie. It has not affected my T in anyway.
I have had three "downs" since onset, all related to my fear of making it worse, or been exposed in situations with sudden noise that I was unable to control (smoke alarm going off over my head for example). The more I started to worry, the more I listened, the more it seemed louder and I started to find new tones or frequencies that I swore were not there before. I am in the middle of a down now. I want to say it is louder now than before, after getting worried that my restaurant visit on Valentine's Day (measured 67-70 db, lets say max 75-80 db just in case the app was off a little). I sat without plugs for 45 min before feeling that the music started to get louder (my ears gets tired faster now than before, I feel tired from 1 hour meeting at work too). Put my plugs in and felt better the rest of the 45-60 min we were there. Even with 80 db for 45 min would still be within the safe zone yes? I can get exposed to that easily on the subway, in the laundry room or outside with traffic around me. But getting that thought "What if I caused it to be worse" - is in my perspective the main cause for my "spikes". I cannot say for sure if my T has changed at all, I want to say yes but then again, I keep comparing my T to my old baseline, holding my hands over my ear to listen for it etc. So yes, I probably feel it has become worse or intrusive, but the possibility of being the same with no change from before is also big. I just didn't pay attention to it at all, now I keep worrying so my brain keeps looking for it.
Also for me, having some kind of noise around me has always been the "cure" for habituation, the brain gets focused on the other stuff around you = less attention to the new sound. Once you realize you have been spending longer time alone focused on something and not hearing the T, you'll feel more confident in your progress = more progress. The anxiety will drop, likewise the worrying. I hope this make some sense for you, hard to explain. This is only my method and my perspective, it won't always work on everyone but it is similar to "Back to Silence"-method that you can find here. When you stop acknowledging the T with emotions or fear, it will become better.
Wish you the best and hope you'll feel better soon,
F.