I experienced sudden sensorineural hearing loss in my left ear in 4/09. My left inner ear was damaged from falling asleep with with ear bud style headphones that I bought from Costco the week before, they completely sealed the ear to increase bass response. The volume was just very low, low enough to help fall asleep after a long day, I woke up about 4am with my left ear to the pillow and the rest is history.
My hearing loss in my left ear is mostly 1000Hz and below due to the hairs in the inner ear dying off (I also have tinnitus now which started since I woke up that morning, blows sometimes).
Enough of my rant, I have all the hearing charts from then and this test reflect similar results for upper frequency 14Hz left ear and 17.4Hz right ear.
The cheese fell off my cracker a long time ago...