When an object makes some kind of noise, it produces vibrations (also known as waves) that travel throughout the air. These vibrations enter to the ear and move to the middle ear to hit the eardrum, causing it to vibrate and develop a series of vibrations to the smallest bones, There are three bones of the ear. The three bones are the incus, malleus and the stapes. They are part of the middle ear and are infact the smallest bones in the human body. The purpose of the three bones is to connect to the hinges and the levers that carry vibrations from the eardrum to the inner ear in the body: the hammer, the anvil and the stirrup. After the vibrations hit the stirrup, they move through cochlea (the inner ear). The cochlea is fluid-filled and contains small nerve endings (known as cilia). When the vibrations reach the cochlea, it makes the fluids move and so do the cilia. The cilia change the vibrations into messages that are sent to the brain. The brain processes the message and recognizes what sound is the vibration acquired. It recognizes what has been stored in the memory, making you identify the sound.
When asked to explain how the ear works, much information was missed during our groups efforts, though main ideas were recognized. In our attempt we were able to identify that when a sound is made vibrations are produced and travel through a canal and encounter three small bones and the eardrum. We were also able to identify the fact that signals are then transferred to the brain where they are processed and then recognized. However, our group was not aware of such details as the inner, outer and middle ear, the names of the three small bones, or how to correctly identify the exact order of the process in which sound travels through the ear.
Sources:
http://library.thinkquest.org
http://en.wikipedia.org/wiki/Ear
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