I don't hear "notes" and "chords", I hear frequencies. My range (at near 50) still goes up to where i can hear the bats talking. In a room with people, i cannot not hear their pulse, breathing, and other biological proceedings...
I had it as a kid, went away in my teen years and now I only have tinnitus. For me it was only on certain frequencies that were boosted and they are near the principal harmonic of my always-there ringing tinnitus or in the frequency of another noise I sometimes hear that's more like a pure sinewave.
As far as I know it's more of a brain thing and not like a super-ear thing.
I don't hear "notes" and "chords", I hear frequencies. My range (at near 50) still goes up to where i can hear the bats talking. In a room with people, i cannot not hear their pulse, breathing, and other biological proceedings...