tinnitus

Noise such as buzzing, ringing, or whistling, heard in the ear without an external stimulus and having multiple causes including infection, trauma, and drugs.

In medicine, a ringing in the ears.

A ringing, whistling, or other imaginary noise perceived in the ears; -- called also tinnitus aurium.

The perception of noise, such as a ringing or beating sound, which has no external source.

A ringing or booming sensation in one or both ears; a symptom of an ear infection or Meniere's disease.