This video illustrates how the "sound" (wavelength) of a gravitational wave changes due to different values of redshift.
P.S. This illustration is also analogous to the redshift of light!
This video was featured on the Living LIGO blog on 10 August 2012 (http://stuver.blogspot.com/2012/08/the-journey-of-gravitational-wave-iii.html)
This video is also viewable on YouTube: http://www.youtube.com/watch?v=054p3Ur-gT0
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