2. The Ear

4. Ear canal Ear drumCochlea Auditory nerve Semi- circular canals - The Ear Pinna Stirrup AnvilHammer Eustachian tube

5. 1. Sound waves are focused by the pinna and enter the ear canal. 2. The ear drum vibrates. 4. In the cochlea, vibrations are changed into electrical messages 5. The auditory nerve passes the electrical messages to the brain (Semi-circular canals are for balance) The Ear 3. The vibrations are passed on by the anvil, hammer and stirrup

6. Parts of the ear Pinna Ear canal Ear drum Hammer Anvil Stirrup Semi- circular canals Eustachian tube Cochlea Auditory nerve collects the sound waves Pass on the vibrations from the ear drum channels the sound waves to the ear drum carries messages to the brain control your balance changes sound into electrical messages controls the pressure in the middle ear vibrates when hit by sound waves

7. Parts of the ear Pinna Ear canal Ear drum Hammer Anvil Stirrup Semi- circular canals Eustachian tube Cochlea Auditory nerve collects the sound waves Pass on the vibrations from the ear drum channels the sound waves to the ear drum carries messages to the brain control your balance changes sound into electrical messages controls the pressure in the middle ear vibrates when hit by sound waves

9. Ear Pinna Ear canal Ear drum Hammer Anvil Stirrup Semi- circular canals Eustachian tube Cochlea Auditory nerve collects the sound waves pass on the vibrations from the ear drum channels the sound waves to the ear drum carries messages to the brain control your balance changes sound into electrical messages controls the pressure in the middle ear vibrates when hit by sound waves Which animals can a human hear higher pitched sounds than? Which animals can hear frequencies above 75000Hz? Which can hear higher a cat or a dog? Which animal can hear the lowest frequency sound? Which animal has the largest range of hearing? A middle C has a frequency around 256Hz, which animals would be unable to here this? The range of frequencies on a piano is from 27.5 to 4186.0 Hz, which animals have a smaller hearing range than a piano can play? Hearing ranges Loudness