Category:Microphones in the 1880s

Microphones by decade
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Media in category "Microphones in the 1880s"

The following 3 files are in this category, out of 3 total.

Adolphe Bitard - Téléphone cropped1.JPG 335 × 422; 71 KB
Hughes Mikrophon.jpg 366 × 245; 12 KB
PSM V17 D027 Carbon microphone of Elisha Gray.jpg 879 × 1,109; 179 KB

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