18-4 STEPS to how we hear sound

T or F? Sound begins with a vibration.

• True

• False

Which of the following shows the correct order in which sound waves travel through the 3 main sections of the ear?

• inner, middle, outer

• middle, inner outer

• outer, inner, middle

• inner, outer, middle

• outer, middle, inner

Which step occurs immediately after sound enters the outer ear?

• sound waves strike the ear drum

• sound waves travel through the ear canal

• sound waves vibrate the hammer

• sound waves reach the cochlea

What is the next step, after sound waves have traveled through the ear canal?

• waves strike the eardrum, causing it to vibrate

• waves cause the hammer to vibrate

• electrical impulses are sent to the brain.

Once sound waves read the middle ear, what happens next?

• vibrations are transmitted to the stirrup

• vibrations move past the anvil

• vibrations are picked up by the hammer

After vibrations are picked up by the hammer, where are the vibrations transferred next?

• to the stirrup

• to the anvil

Once vibrations pass to the anvil, they are transmitted to which part of the ear?

• ear canal

• eardrum

• hammer

• stirrup

• cochlea

After vibrations are transmitted to the stirrup, the vibrations move to membranes of the ________________

• outer ear

• middle ear

• inner ear

The fluid filled cavity, containing hair like projections, is known as the ___________________

• cochlea

• hammer

• anvil

• stirrup

• auditory nerve

Once vibrations are channeled into the cochlea, they are then detected by the _________________

• hammer

• auditory nerve

• stirrup

• eardrum