Tinnitus (pronounced ti-ni-tis), or “ringing in the ears,” is the perception of a sound in one or both ears, without there being an external cause for that sound. Typically experienced as a ringing, buzzing, clicking, hissing, or roaring, the sounds heard with tinnitus can be intermittent or constant, loud or soft. While the experience of tinnitus can vary widely, the effect upon sufferers is often similar: difficult and tiresome. These sounds may come and go, but for most, the symptoms produce a constant, maddening drone.