Dude, please tell me your on this site? I was doing a period of healing, eating well, meditation, then one random morning out of the blue I woke up deaf in my left ear with horrible tinnitus. The deafness is gone but the tinnitus remains. What is "flatline symptom"? How are you doing? Do you have any advice? Did the tinnitus fade?
I've never heard of either ringing in the ears nor going deaf in an ear being a flatline symptom. Seriously, if this is new for you - I'd get it checked out. @oolongmonkey