Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsLongitudinal and Transverse Waveshttp://demonstrations.wolfram.com/LongitudinalAndTransverseWaves/]]>http://demonstrations.wolfram.com/LongitudinalAndTransverseWaves/