Transcript Sound Notes 4

Sound Notes 4 - Hearing
Hearing
• To hear, you need 3 things:
• Source of Sound
• Medium to transmit sound
• Sense organ to detect the sound
Ear
• Sense organ that detects sound
• 3 Main Parts of the Ear
• Outer Ear
• Middle Ear
• Inner Ear
Hearing: How it Works
waves
• 1) Sound ______________
enters the outer ear.
ear
• 2) Outer ear funnels the sound wave into the ______
canal
eardrum
________
to the ____________.
vibrates
• 3) Eardrum _______________
due to vibrating
air particles
________________
in the sound wave.
middle
• 4) Vibrations are transferred to the __________
ear.
The middle ear has 3 small bones;
hammer
anvil
stirrup
the ____________,
__________
& ____________.
anvil
• 5) Vibrations transferred from hammer to __________,
stirrup
then to the ______________.
Hearing Continued
inner
• 6) Vibrations transmitted to ___________
ear then
cochlea
transferred to ______________.
liquid
• 7) Cochlea is filled with _____________
and is attached
to __________
__________.
nerve
fibers
• 8) Nerve fibers join to form one nerve that goes to the
brain
____________.
• 9) Vibrations from the cochlea become
electrical
impulses
__________________
_______________
in
the nerve. The nerve transmits the impulses to the
brain
__________.
The brain
SOUND
interprets the electrical impulses as _____________.