IIRC, the previous guy left (don't remember if willingly) because he questioned the legality of what they were doing. You can all but guarantee that his replacement is a huge piece of shit.
We're sorry, but we no longer need you... or want you, or even care about you. Machines can do a better job than you, and this is what you get for asking questions. The humans agree sacrifices must be made, computers never go on strike. To save The Working Man you have to put him out to pasture....
I used to mow lawns growing up. Would listen to headphones to drown out the mower. 30 years later I essentially hear this 24/7: https://www.youtube.com/watch?v=D96_1AsUajA
My wife (and everyone else who knows me) knows my general hearing is bad, but not horribly so, and much worse in noisy situations. There are times when I don't hear that tone as much, but it's there every morning when I wake up and it's quiet.
Also, at max volume, I had to hold the phone speaker on my ear to make sure that video was even making a noise.
Frequencies above 6k-7k have disappeared/are always there.
Do yourself a favor and take advantage of noise-canceling headphones so you can keep the volume down.
IIRC, the previous guy left (don't remember if willingly) because he questioned the legality of what they were doing. You can all but guarantee that his replacement is a huge piece of shit.