Ear ringing

Tinnitus (IPA pronunciation: or , from the Latin word for "ringing") is the perception of sound in the human ear in the absence of corresponding external sound(s). Tinnitus can be perceived in one or both ears or in the head. It is usually described as a ringing noise, but in some patients it takes the form of a high pitched whining, buzzing, hissing, humming, or whistling sound, or as ticking, clicking, roaring, "crickets" or "locusts", tunes, songs, or beeping. It has also been described as a "whooshing" sound, as of wind or waves.
See more at Wikipedia.org...

Tinnitus is hearing ringing, buzzing, or other sounds without an external cause. [more]Ear ringing - Community and Resources

Together with other abnormal ear noises, ear ringing is medically called tinnitis. Tinnitus can arise in any of the four sections of the ear: the outer ear, the middle ear, the inner ear, and the brain. If tinnitus persists and its cause is unknown, a hearing test (audiogram) should be done. Measures can be taken to lessen the intensity of tinnitus.