Tympanum: function of vibration by sound stimuli

What is Tympanum?

The eardrum is a very thin and semitransparent membrane of the middle ear. It has a circular shape, enclosed within the external auditory canal. Its function is to vibrate by sound stimuli; These vibrations are transmitted through the middle ear.


The eardrum can be explored by the doctor through otoscopy. To observe it, a beam of light is directed upon its surface. Its coloring is a gray or bleached tone.

Tympanic disorders

There are several diseases that cause a loss of normal coloration of the tympanic membrane, such as acute ear infections, in which the eardrum becomes more or less reddish over a serous and purulent background. Sometimes the integrity of this membrane is lost due to acute infectious conditions or various traumatic processes.