Time on this recording has been compressed, so that 73 seconds corresponds to 27 minutes. Since the frequencies of these emissions are well above the audio frequency range, we have shifted them downward by a factor of 44.
NASA put up special instruments which recorded electromagnetic vibrations on the Voyager space probe and converted that into actual sound. The recordings include the sounds of Saturn’s rings, Neptune, Jupiter and Uranus as well as what Earth would sound like millions of kilometres away.
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