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Perception Of Sound Essay

2530 words - 10 pages

Hearing allows us to do our everyday activities and improves our lives. It enables us to communicate, socialize, and interact in our environment. Good hearing also helps to keep us safe, warning us of dangers or alerting us to someone else’s distress. Hearing is necessary for us to be able to participate in life more fully. Our hearing provides us with a huge source of information; some of it is known to us and some we don’t even notice but when combined, this information gives us the opportunity to be aware and interact in our world. Hearing helps us live our everyday lives without limitations. Some everyday situations where are hearing is important are at work, at social occasions, learning, and for our own safety.
Our ears are intricate pieces of work and there is a lot to the anatomy and physiology of how the ear. The visible or external part of the ear has more of an action like funnel, amplifying sound waves to be captured and easily directed in the ear canal. The Pinna has an interesting role allowing the canal to receive low sound frequencies by reflecting off of the Pinna. The interesting observation about the Pinna is that not only does it act as a reflector for low frequency but acts as a filter for High frequencies to not destroy the ear drum. (http://en.wikipedia.org/wiki/Pinna_(anatomy))
The Tragus is the small piece of skin that covers the ear canal. Its name came from the Greek term of a goat because of the hair that grows off of it resembled a goat’s beard. The hair off of this does have a use though as it collects sound from behind. Below the tragus is the Ear Lobe which does not have any major function for the body but it is the area that people pierce to have earrings. Sometime people have allergic reactions to metals which the ear then rejects the earrings. Another problem known by the ear lobes are when they heal they sometimes create keloids. A keloid is not a reaction but a growth of scar tissue that is created by over puncturing of the ear. (http://en.wikipedia.org/wiki/Keloid)
Working your way into the External ear canal and Middle ear is where sound waves are transported to. The External ear canal allows for a strait passage to the Tympanic membrane otherwise known as the ear drum. The tympanic membrane is very thin but strong and as sound hits this membrane it vibrates. The membrane sends vibrations to the ossicles in the middle of the ear. Damage to the ear drum is very common in some sports like swimming and scuba diving as the pressure of the water ruptures the ear drum. Rupture of the ear drum can also occur from traveling by plane or to high mountain tops as the pressure closes in the membrane. Lastly the ear drum can be damaged by a foreign object being stuck to far into the ear canal or by an extremely loud noise or explosion which would cause Tennititus which I will explain later on.
`The Ossiclea would be the next step in how sound is heard. The Ossicles are the three smallest bones in the entire body,...

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