Sound pressure recordings, 19th century

Sound pressure recordings, 19th century

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Credit: SCIENCE PHOTO LIBRARY

Caption: Sound pressure recordings, 19th-century artwork. These recordings (black circular areas) are produced by a process called tonography, recording on a membrane the sounds produced by different humans using a variety of musical instruments. Artwork from the 20th volume (second period of 1897) of the French popular science weekly 'La Science Illustree'.

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Keywords: 1800s, 1890s, 1897, 19th century, annual volume, artwork, black-and-white, book, european, french, historical, history, illustration, la science illustree, louis figuier, magazine, monochrome, physical, physics, popular science, sound pressure recording, sound wave, technological, technology, tonograph, weekly

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