@eclectic Ah, I cannot hear beyond 10-12KHz as well, in both ears. I know for 12KHz the sound has to be like 90dB before I can hear it quietly.
My left ear hears much better than my right. My right ear is muffled, everything sounds like a blender even running water, pitch is off, and often times sounds like a dying cassette player. Although my right ear drum is not the perfect shape.