How were phonautograph recordings finally made audible in 2008?
Answer
Modern researchers converted the visual lines into audio
Although the phonautograph could capture the physical imprint of sound, it lacked a mechanism for playback at the time of its creation. The recordings remained silent for decades. In 2008, researchers successfully scanned the faint, wavy lines preserved in the soot and used modern technology to process and convert those visual patterns back into audible sound, finally validating the accuracy of the original recordings.
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