1. Hearing, Hearing Loss and the Human Ear
Hearing Test
Hearing Frequencies
Hearing Loss and Earbuds
Teen Hearing Stats
Hearing Loss Prevention
The Human Ear
Outer, Middle and Inner Ear

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3. Hearing Test
Humans can generally hear from 20Hz to 20kHz. See where you fall
As we age we lose the ability to hear high frequencies. Click the image to the right to see if you can hear the higher frequencies
How old are your ears?
Please note that the video and test links have been removed on this sample. In the full version you simply open the lesson in slideshow mode and click the image.

4. Hearing Frequencies Many animals can hear sounds a human cannot
For example “dog whistles” make a sound higher than humans can hear.

5. Hearing Loss and Earbuds
There are many ways to lose your hearing such as disease, trauma, aging, etc., but the most common cause of ___________
Earbuds are especially bad since it sends the sounds directly into the ear
In slideshow mode, click the video images below and your video will automatically open in your browser.

6. This slide has been removed

7. Teen Hearing Stats ___________
9/10 listen to music too loudly for to long
The American Speech-Language-Hearing Association found that ………………

8. Prevention _________ Turn down the volume!
See a doctor if you experience any ringing in your ears
Stay away from speakers at concerts
………………….

9. The Human Ear – The Anatomy of Hearing
The human ear consists of three basic parts:
The Outer Ear
The Middle Ear
The Inner Ear

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11. The Middle Ear __________ The eardrum is less than 0.1 mm thick
Sound causes the eardrum to vibrate

12. The Middle Ear Continued
There are three connected bones which attach to the eardrum
___________
These bones increase the sound and pass it on to the middle ear

13. The Middle Ear Continued
The middle ear is filled with air ……………..
Pressure can buildup in the middle ear during altitude changes causing pain
___________

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15. The Inner Ear
The waves cause the movement of microscopic hairs inside the cochlea
Similar to grass moving in the wind
__________
The brain interprets these signals as sound