Boudet's microphone: this consisted of a glass tube 3ins long and ins in diameter. Copper cylinder, M was connected to membrane of rubber (D) at one end and to six carbon balls at the other. Screw at V was used to adjust pressure of contact between balls. Dated 1882.

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Boudet's microphone: this consisted of a glass tube 3ins long and ins in diameter. Copper cylinder, M was connected to membrane of rubber (D) at one end and to six carbon balls at the other. Screw at V was used to adjust pressure of contact between balls. Dated 1882.

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: archival, archive, boudet, cylinderrubbermembranecarbonpressureballselectricalelectricelectricitycommunicationsoundrecording, historical, history, microphone, microphoneboudetmicrophoneglass, tubecopper