http://www.bestmp3playerearbuds.com/sound-headphone/
How come sometimes when I play a song, in one headphone, I hear a sound effect, but not in the other?
I'm doing a Science project on headphones and I need to know about how speakers split a sound... Thanks! 
Each speaker basically has its own track. Stereo sound uses left and right, 5.1 surround uses 5-6 and so on. Think of two cars going down a freeway. They might both be green, but one can turn left and one might speed up. They are independent of each other. For mono sound they just combine both tracks.
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