I discoverd that low frequesencies have very big waves. in order to hear this low frequencies we need a loudspeaker that able to cause an electric current flow much bigger than usual. the sub woofer is manege to do that.
loudspeaker translate electric current flow into vibration that couse the air to move – and this is the factor that we can feel by the sense of the touch.
in the video you can see this…. i decided to upload it without the sound becouse i want to focus only in the factor of thouch. http://www.youtube.com/watch?v=8gsul5qsfH4
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