Endaural phenomena are sounds that are heard without any external acoustic stimulation.
Phenomena include transient ringing in the ears (that sound like sine tones), white noise-like sounds, and subjective tinnitus.
Endaural phenomena need to be distinguished from otoacoustic emissions, in which a person's ear emits sounds.
The emitter typically cannot hear the sounds made by his or her ear.
This article about a disease of the ear and mastoid process is a stub.