LIGO Document G1200797-v1

The "Sound" of Redshift

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Document type:
G - Presentations (eg Graphics)
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A gravitational wave is affected by few things on its journey to the Earth. One of these things is something called redshift: the expansion of a wave's wavelength (distance between each wave's crest) due to the expansion of the Universe. While gravitational waves make no sound, if you put their signal though a speaker you would be able to hear them.

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 (

This video is also viewable on YouTube:

Files in Document:
video redshift outreach

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