Sound

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Brain Pop Movie on Sound

http://www.brainpop.com/science/energy/sound/index.weml?&tried_cookie=true

Encarta on Sound

http://encarta.msn.com/encyclopedia_761560639/Sound.html

Sound Waves

http://homepage.tinet.ie/~kogrange/sound_waves.html

Sonic Boom

http://www.pbs.org/wgbh/nova/barrier/

Sound Waves and the Ear Drum

http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/waves/edl.html

Noise Induced Hearing Loss

http://www.agius.com/hew/resource/nihl.htm

National Campaign for Hearing Health

http://www.nchh.net/cms/index.cfm?displayArticle=16