What is eardrum? How does it is play an important role in hearing?

We hear sound through our ears. The shape of the outer part of ear is like a funnel, when sound enters in it, travels down a canal at the end of which a thin membrane is stretched tightly. It is called the eardrum. It performs an important function The eardrum is like a stretched rubber sheets. Sound vibrations make the eardrum vibrate (see fig 13.2) the eardrum send vibrations to the inner ear. From there, the signal goes t the brain. That is how we hear.