Question

How is sound transmitted through different parts of the ear and how are we able to hear the sounds around us? [2 Marks]

Answer 1

The sound waves that reach the external ear pass through the ear canal and strike the eardrum that causes vibration in it. This sets the bones in our ear to vibrate which is then transmitted to the cochlea of the inner ear. This vibration in the cochlea stimulates thousands of nerve cells in the cochlea and impulses are formed. When these impulses reach the brain through the nerves, we are able to hear the sound. [2 Marks]