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727 yottabytes is about 20,000 times as much as All Spoken Words in Human History (recorded)
In other words, it's 18,000 times the amount of All Spoken Words in Human History (recorded), and the amount of All Spoken Words in Human History (recorded) is 0.000056 times that amount.
(2003 figures) (assumes 16 Khz, 16-bit mono recording)
Criticizing a 2002 estimate of 0.00000480 yottabytes, linguist and University of Pennsylvania professor Mark Liberman asserted that it would actually require 0.041 yottabytes to house a recording of all speech in human history, even at a relatively low level of quality. For the purposes of his calculations, Liberman estimated the total duration of such a project to include 416,390,367 years of continuous audio.
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