When you lose hearing, it's in X range, so while we might hear these high pitched sounds, its nothing more then a fun test. The real problems are the sounds that land in the normal talking range. If those go to chit, you can hear down low, or all the fun high pitched sounds, yet can't hear chit when someone talks to you.
Always do hearing test from time to time. Not computer website hearing test, go to a legit ENT doctor and get it done correctly.
It could be a real wakeup call for some people who blast music way to high, have loud ass cars, or even do something as simple as ride around with the windows down.
Once it's gone.... It's gone.