the ear can be divided into 3 parts

the ear has 2 jobs- 1 to help you hear & 2 to help you keep your balance

Outter

• is made of cartilage and soft tissue.

• pinna serves as a collector of sound vibrations around us and guides the vibrations into the ear canal.

• It helps us decide the direction and source of sound.

Middle

• Ear Canal: funnels the sound to the ear drum.

• Ear Drum: collects the vibrations from the air and passes it to the middle ear.

• the ear canal is where you also find ear wax

Middle

• The middle ear contains three tiny bones, called the Ossicles.

  hammer/anvil/stirrup

• They are the smallest bones in the human body, designed to transfer vibrations from the eardrum to the cochlea.

• Eustachian Tube extend from the middle ear to the back of your throat. They help remove fluid and balance pressure on your ear drum

Inner

• Cochlea is filled with fluid and hair cells. When vibrations enter, the hair picks them up, vibrate and create and electric signal.

• The cochlea changes the vibrations into electrical signals that the brain can use. If damanged can cause hearing loss

• The auditory nerve collects the electric signals and sends them to the brain. They are interpreted and assigned meaning, so you can hear a sound.

• The semicircular canals are filled with fluid and are part of our balance system. When the fluid is disturbed you feel dizzy.

What is Sound?

Sound is vibrations that travel through air or a medium and can be heard when they reach a person's or animal's ear.

​Medium - air, liquid or solid.

Sound needs a medium.

​What medium do you think sound travels fastest in?

What are the children doing?

What Causes Sound?

Sound is made because of vibrations.

What are Vibrations?

Vibrations are back-and-forth motions....WAVES.

Waves

We may think of the word "wave" as something you do with your hand, or what we see in water. What does is mean in physics?

Waves

In physics, a wave travels through matter transferring energy from one place to another.