My pride is my shield, My dreams are my compass, My happiness is my weapon: Sound

Tuesday, May 17, 2011

Sound

Author's Note:
This is a content essay on sound. I am focusing on formatting.

Music blasting out of speakers in your son's bedroom. Girls jumping on beds and running around in your daughter's. Your husband's out back with the lawn mower. You ask yourself if it could be any louder. Then the phone rings. There are too many noises around here. Even the slightest noise makes a bang right now. Crack! You can't stand all of this sound. Sound, while somewhat annoying, is still a quintessential part of life.

While sometimes loud, sound is made by air vibrating. The same is true for sounds made by musical instruments. The difference between noise and music is that musical sounds are organized into patterns that have pitch and rhythm. Noise is just random, unorganized sounds. Sounds are made and move the same way whether they are musical sounds or noise.

Most musical instruments have some device that creates sound waves when moved. Sounds are different because of harmonies, which are higher and quieter sounds mixed in. A musical sound is called a tone and is produced by air vibrating an inevitable number of times per second. These vibrations are called waves. These sound waves must be controlled in some way so that the entertainer can control the volume, value of the tone, and how long it plays.

The number of times that a sound wave vibrates in a second is called its frequency. Scientists even have a name for how they measure the frequency of sounds, they call it hertz. High notes have a higher frequency than lower notes and this changes their shape. Different types of sound waves have different shapes. The pictures shows what sound waves "look" like.

Sounds can be very different from one and other, but all we see, hear and feel is music, noise, and headaches. Also, sounds can be viewed between soft notes, high notes, loud notes, and loud notes. Finally, sound can be measured in cycles by units called hertz.

Sources:
http://www.google.com/url?sa=t&source=web&cd=3&ved=0CEkQFjAC&url=http%3A%2F%2Fdictionary.reference.com%2Fbrowse%2Fsound&rct=j&q=sound%20&ei=xXPSTdHRJcXAtgfU0_WuCg&usg=AFQjCNH4Eg2W_vPKvDJ_V-yXGVRmqhLutg&sig2=SfWvCZu0wjV_6_SrPniLlw&cad=rja
http://www.google.com/url?sa=t&source=web&cd=8&ved=0CG8QFjAH&url=http%3A%2F%2Flibrary.thinkquest.org%2F26585%2F&rct=j&q=sound%20&ei=xXPSTdHRJcXAtgfU0_WuCg&usg=AFQjCNFzdhgN7kdqGXXpMgUSx543iAilQw&sig2=--AQOqZL3b_Ii-K9Ome9yg&cad=rja

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