Hearing

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• Leerjaar 1

Name parts of the ear
you already know

In Dutch

External/outer ear

Pinna

Ear canal

Eardrum (sort of border)

So? how does hearing 'technically' work?

Stimulus?

Collecting info

The way sound travels

Pinna - Ear canal - Eardrum - Hammer - Anvil - Stirrup - Cochlea (creates nerve impulse) - Auditory nerve --> cerebrum 

What is the missing word in the way sound travels through the ear?
Pinna - Ear canal - ..?.. - hammer - anvil - stirrup - cochlea - auditory nerve

Hertz vs Decibel

Hertz = unit to express how low or high a certain sound is.

Decibel = unit to express how loud a certain sound is.

Hertz

Many waves give a higher sound than just a few waves

Hertz

Here you can see a low sound becoming a little bit higher.

Decibel

A big soundwave produces a loud noise. A small soundwave produces a more quiet sound.

Decibel: This sound starts loud!

Air pressure

Why does it hurt and why do our ears pop?

When landing a plane

When climbing a mountain/taking flight

Air pressure on the outside is very low, on the inside relatively high. You'll have to swallow some water in order to 'pop' your ears.

Air pressure pushes on eardrum

Eustachian tube connects to your nasal cavity/throat.

Why do we have semicircular canals?

Which part should I explain again or did you find most difficult?