The EAR How Do We Hear? By Nicole Medford October 12, 2007.

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Presentation transcript:

The EAR How Do We Hear? By Nicole Medford October 12, 2007

Parts of the Ear Outer Ear Middle Ear Inner Ear

How do we hear sounds? Sounds waves enters our ears from the Outer Ear and beats on the eardrum

How do we hear sounds? The Middle Ear: Good Vibrations The Middle Ear take the sound waves from the Outer Ear and turn them into vibrations as it passes along the way to the inner ear.

How do we hear sounds? The Middle Ear: Good Vibrations (cont.) The Three (3) Tiniest Bones in the middle ear are called Ossicles (ah- sih-kulz). 1. Malleus: attached to the eardrum also known as the “hammer”

How do we hear sounds? The Middle Ear: Good Vibrations (cont.) Three (3) Tiniest Bones in the middle ear are called Ossicles (ah-sih-kulz). 2. Incus: attached to the malleus also known as the “anvil”

How do we hear sounds? The Middle Ear: Good Vibrations (cont.) Three (3) Tiniest Bones in the middle ear are called Ossicles (ah-sih-kulz). 3. Stapes (stay-peez): attached to the incus also known as the “stirrup”

How do we hear sounds? The Middle Ear: Good Vibrations (cont.) Eustachian Tube: Known as the “Equalizer”. It makes sure air pressure is the same on both sides of our eardrum. When it opens, you feel a “pop”.

How do we hear sounds? The Inner Ear: Where Nerve Signal Begins Nerve signals created by tiny hairs in the cochlea (ko-klee-uh), which the sound vibrations causes the hairs on the cell to move. It gives a nerve signal in the brain to understands as sound.

How can we protect our ears? Wear earplugs at loud music concerts and around noisy machinery (i.e.: wood or metal shop) Turn down the volume on your stereo, i-Pods, MP3 player headphones. Do not stick foreign objects (i.e.: hair clips, cotton swabs)

Questions??? The Outer Ear is where sound waves begins it’s journey to the inner ear. True or False? The Middle Ear turns sound waves into vibration. True or False? The Ossicles are the three tiniest bones located in the inner ear. True or False? The nerve signals are tiny hairs in the cochlea which gies our brain to understand as sound. True or False? When you ear pops, it means that the air pressure in your ears are not equal. True or False? Bonus Question: Name “3” things you can do to protect your ears.