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...When you hear a person talking dog barking or police siren sound most sounds are very loud others soft high like whistle low rumble of thunder vibrations make remember that energy is the ability to something move happen change can made by vibrating vibrates it moves back and forth fast think about what happens someone plucks guitar string each time bumps against air nearby makes vibrate too more so on through in waves click here for ripples pond toss pebble into wave ripple effect animation travel from all directions reach your ears ear eardrums inside signals brain http www harcourtschool com activity science up clo se deploy interface html...