Tinnitus - the perception of sound in the ear, in the absence of external sound - affects around 25 million people worldwide. It occurs in adults as well as in children, in war veterans and factory workers, in classical musicians, rockstars, and disc jockeys. Consequently, a history of recreational, occupational, and firearm noise exposure may all be associated with an increased likelihood of acquiring tinnitus. Being a subjective phenomenon, tinnitus...