You can't hear with your ear but your brain knows what is going on and play the music for you. (in most}
There are classical conductors that can't hear 4k that can correct a player at 10k.
One of THE most wanted one around the world is 93 !
Are Your Ears Good? Simple Test For Your Ears
Gents.
Just a simple test to check the condition of your ears. When listening to music, use your thumb to block the passageway of the right ear. Listen for about 10 seconds, then repeat for the left ear.
My left ear hears a fuller sound across the frequency spectrum. With the right ear, the sound is thinner and leaner with reduced bass and midrange. Both ears hear differently.
I have a deviated septum, and perhaps this condition has contributed to my imperfect hearing.