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• 1) Sound ______________ enters the outer ear.
• 2) Outer ear funnels the sound wave into the ______ ________ to the ____________.
• 3) Eardrum _______________ due to vibrating ________________ in the sound wave.
• 4) Vibrations are transferred to the __________ ear. The middle ear has 3 small bones;
the ____________, __________ & ____________.
• 5) Vibrations transferred from hammer to __________, then to the ______________.
waves
earcanal eardrum
vibratesair particles
middle
hammer anvil stirrup
stirrupanvil
Hearing Continued• 6) Vibrations transmitted to ___________ ear then
transferred to ______________.
• 7) Cochlea is filled with _____________ and is attached to __________ __________.
• 8) Nerve fibers join to form one nerve that goes to the ____________.
• 9) Vibrations from the cochlea become __________________ _______________ in
the nerve. The nerve transmits the impulses to the __________. The brain
interprets the electrical impulses as _____________.
innercochlea
liquidnerve fibers
brain
electrical impulses
brainSOUND
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