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Hands-On! Activity – Make Your Own Middle Ear
What's the Point?
The Auditory Pathway
Your middle ear contains three tiny bones called the ossicles. They work together to transfer an exact replica of the sound energy gathered from your outer ear (air waves) to your inner ear where is finally is sent to your brain.
The first bone is called the hammer. It sits on top of your ear drum. As the ear drum vibrates it pushes the hammer.
The second bone is called the anvil. As the hammer moves, so does the anvil.
The third bone is called the stirrup. The anvil causes the stirrup to move. The stirrup vibrates on the oval window transfering an exact replica of the sound to your inner ear.
The process changes sound energy from mechanical energy into pressure waves in the inner ear. This is the main purpose of your middle ear.
Just for Fun
The stirrup is the smallest bone in your body. What other small bones can you identify in your body?
Imagine that you are an air wave, created by a flute. Close your eyes and imagine what it would feel like to leave the flute, strike you ear, and vibrate through the eardrum ossicles, into your inner ear. What does it feel like to change forms, from air waves into mechanical waves on the ear drum and ossicles?
Strike a tuning fork and place it on your forehead. Can you hear it? Why? How is your ear connected to your skull?
"Friends, Romans, countrymen, lend me your ears;
– William Shakespeare
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