"Tinnitus is the perception of sound within the human ear in the absence of corresponding external sound."
I, unfortunately, am a sufferer of tinnitus. Normally it is random, short and inconsequential. Recently, however, it has become more prevalent, and as such more bothersome.
I would describe the sound as being... like static, but it's overlapping some other noise, which at present I cannot distinguish.
At first I assumed it was my shitty headphones, but it persisted after their removal.
I should probably see some form of medical expert :/