Dunno. But I have purchased the kind for music, back when I was in a band. Much better than the foam kind. They also attenuate sound evenly rather than the drill thinking of adults in a Charlie Brown Christmas special. Great for concerts.

After a number of years with my first company (a household name), I quit and got an 80% raise. Based on how quickly my new company accepted my salary request, I’m pretty sure I could have asked for more.

Get a better paying job once you’ve got some experience. Raises won’t keep up with your value.

Don’t work yourself to the bone. There really are plenty of jobs that only require 40hrs/wk and pay the same or better.

Work somewhere with a good culture.