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 ear canaleardrum vibrates air particles middle hammeranvilstirrup anvil

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 _____________. inner cochlea liquid nervefibers brain electrical impulses brain SOUND