![](http://www.alamy.com/thumbs/6/4B09987F-CB36-4814-929B-6DA2C14B4F74/2BDYG0T.jpg)
Edison Phonograph and Carbon Microphone, 1878
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Photo credit: © Science History Images / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., 1878, 19th, acoustics, art, balcomb, carbon, century, edison, engraving, history, invention, microphone, mircrophone, phonograph, science, scientific, technology, thomas, wood