Thomas Edison's Sound Meter. A machine which measured the vibrational energy of sounds made by the voice.

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Thomas Edison's Sound Meter. A machine which measured the vibrational energy of sounds made by the voice. From El Museo Popular published Madrid, 1889

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Photo credit: © Classic Image / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, century, device, edison, edisons, energy, illustration, invention, inventor, machine, measured, measuring, mechanism, meter, nineteenth, science, sound, sounds, technological, technology, thomas, vibrational, voice