Phonodeik

The Phonodeik is a sound-recording apparatus invented by Dayton Miller in 1908. The Phonodeik converts sound waves into visual images.

Source: Wikipedia — Phonodeik (CC BY-SA 4.0)

Phonodeik

The Phonodeik is a sound-recording apparatus invented by Dayton Miller in 1908. The Phonodeik converts sound waves into visual images.

Source: Wikipedia "Phonodeik" · CC BY-SA 4.0

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