I spoke to my parents and for now I wont have to mow the lawn. I've been thinking about it all day and I'm not going to risk it. They think it's my wisdom teeth that are causing the ringing because all four them are coming out.
This is more likely from the noise of the mower, and other noise exposures, than your wisdom teeth.
I got my T from lawn equipment, a combination of the mower, weed trimmer, and blower, all gas powered. My lawn takes almost 3 hrs to do on a weekly basis.
I was not sure if I should keep doing it after the T developed, but as it was Fall, and hard to get a gardener at that point, I proceeded with the addition of earplugs. My T would increase just slightly for about an hour after, and then go back to baseline.
This year, I upgraded the protection, after going through several earplugs, and now use Howard Leight Max1 (NRR 33), along with low profile ear muffs (NRR 20). I have done it twice the season, and no spikes after, and my T continues to improve. I find the ear muffs useful as not only does it make it quieter, but also it helps to keep the earplugs from getting pushed on by the branches of passing trees, which can start to dislodge them.
Each of us needs to decide if we wish to do this type of noise exposure, but I have enjoyed the activity for many years now, and plan to continue doing it, taking reasonable and appropriate precautions.
I would strongly caution those that have T from using a lawn mower with no protection, even for a few minutes, as it is high risk to make the T get much worse.