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1 янв 1857 г. - Phonautograph

Описание:

In 1857, the Phonautograph was invented. The Phonautograph is the earlies known device for recording sound. It was invented by Édouard-Léon Scott de Martinville who used it in an experiment so that he could see sound.

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1 янв 1857 г.
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~ 168 г назад

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