1. The anatomy of the ear and how it turns sound waves into information
How do we hear?
The anatomy of the ear and how it turns sound waves into information

2. Outer Ear
3 main parts
Pinna: “wing” the outer portion of the ear that helps collect sound waves
Lobule: commonly referred to as the ear lobe
External ear canal: funnels sound from the environment to the middle and inner ear

3. Middle Ear This includes the 3 bones of the ear and the ear drum
Its main job is to help send vibrations to the nerve inside of the ear

4. Ear Bones The ear is home to the three smallest bones in the body
From outside to inside their names are the malleus, incus and stapes
The malleus is attached to the ear drum and vibrates when sound waves enter the ear
The incus relays the vibrations from the malleus to the stapes
The stapes is the smallest bone in the human body
When the stapes moves is triggers the movement of the fluid in the inner ear

5. Inner Ear The cochlea, semicircular canals and cochlear nerve
The cochlea is a snail shaped organ that acts as a microphone for the ear
The semicircular canals help us to maintain balance
The cochlear nerve sends the amplified wave from the cochlea to the brain where it is translated into a sound (what we actually hear)

6. The Cochlea
Inside the cochlea is a complex series of panels and hair fibers
Each sound moves a different set of hair fibers
The hair fibers send the message to the nerve and the brain
Each change in pitch and volume triggers a new reaction inside the cochlea

7. Lets put it together

8. Video
How do we hear?

9. https://www.youtube.com/watch?v=TeFRkAYb1 uk

10. https://www.youtube.com/watch?v=Odq7W2u2 Xj8

11. https://www.youtube.com/watch?v=gZxLUNHE mPw