How to hear

Dear students,

Let´s investigate a little bit more about the hear.

How much do you know about the ear? What´s the eardrum? Where is the cochlea?
Let´s complete the info in your notebook:

1.     1.  When the eardrum vibrates, it makes the small bones inside the ear vibrate too.

1.     2.  Sound waves go into our ear and hit the eardrum. As a result, the eardrum vibrates.

1.     3. The cochlea detects the vibrations and produces nerve impulses. The auditory nerve transmits these impulses to the brain. Then, the brain interprets the information.

Looking after our hearing:

The wax in our ears protects our inner ear from the bacteria, dirt and water. It´s important not to remove this wax because it helps to keep our ears healthy.

Very loud noises can cause permanent damage to our eardrums. Turn the volume down when you use headphones. Stay away from very noise places, or use ear protection to prevent hearing damage.

Create a mindmap:

Can you describe the three steps to hear?

What happens when the eardrum vibrates?

What does the cochlea detect? what does it produce?

What does auditory nerve do?

What does the wax do in our ears?

Activity. Complete the sentences in your notebook.

a)     The skin has three layers, the _____________________________________.

b)     If you get severely burn, you should ____________________________

c)     When sound waves enter our ear, first _________________ then _________________

d)     When can protect our sense of hearing by __________________________