Marconi-Reis transverse-current carbon microphone
- Made:
- 1925-1935 in United Kingdom
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LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
License
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Marconi-Reis transverse-current carbon microphone, invented by Georg Neumann, unknown maker, British, 1925-1935.
This was the BBC's standard microphone between 1926 and 1933. Within the heavy marble body of the microphone carbon granules fill a shallow space between electrodes placed along its shorter sides. As sound entered the microphone the sound waves compressed the carbon granules, affecting an electrical signal that could be transmitted by radio.
Details
- Category:
- Radio Communication
- Object Number:
- 1949-131
- Materials:
- marble (limestone) and metal (unknown)
- Measurements:
-
overall: 105 mm x 140 mm x 95 mm, 1.78kg
- type:
- microphone
- credit:
- Donated by the British Broadcasting Corporation.
