I'm mid 20s and my hearing is pretty much perfectly cut off at 11 khz but is fine below. I've had tinnitus since youth and have had lots of exposure to loud music but it hasn't gotten tremendously worse overtime and doctors either wave it away or say it's from noise induced hearing loss, which seems at odds with the 4 khz thing I've heard from you and others.

Any perspective on what the deal with that would be? I haven't ever used an ototoxic medicine or anything