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http://www.physicsclassroom.com/class/sound

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https://www.youtube.com/watch?v=MA1n16iyaeg

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http://lmgtfy.com/?q=wave+physics

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https://method-behind-the-music.com/mechanics/percussion/ how percussion instruments work

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Ashley Barrett

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https://www.youtube.com/watch?v=MA1n16iyaeg

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http://www.npr.org/sections/health-shots/2015/09/10/436342537/how-sound-shaped-the-evolution-of-your-brain

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http://www.instructables.com/id/How-to-Make-a-Cheap-iPhone-Speaker/

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If you want to build a speaker http://www.popularmechanics.com/technology/audio/how-to/a3485/build-your-own-speakers/

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http://lifecheating.com/2013/09/24/homemade-iphone-speakers/http://lifecheating.com/2013/09/24/homemade-iphone-speakers/

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http://www.instructables.com/id/Homemade-speaker/

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https://www.youtube.com/watch?v=cO_IFJaWmhA&vl=en

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http://www.physicsclassroom.com/class/sound
if you want basics of sounds and music type then you go here

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http://www.physicsclassroom.com/class/sound