To amplify sound energy to match impedances between air and fluid

To equalize sound pressure across the eardrum

To attenuate sound energy to match impedances between air and fluid

To funnel sounds down the ear canal

To convert sound waves into pressure waves

G

D

H

A

C

E

B

F

The way sounds get to the cochlea in really dumb people

The way sounds get through the air to strike the ear drum

The hearing problem that arises when the bone grows over the oval and round windows

The route by which sounds travel through the skull bones to reach the cochlea

The hearing problem that arises when the bone grows over the round window

make it harder to see near objects clearly

reduce astigmatism and make it harder to see near objects clearly

reduce spherical aberration and make it easier to see near objects clearly

make it harder to see far objects clearly

reduce spherical aberration and make it easier to see far objects clearly