Voigt condenser microphone

Voigt condenser microphone Voigt condenser microphone Voigt condenser microphone Voigt condenser microphone Voigt condenser microphone

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Creative Commons LicenseThis image is released under a CC BY-SA 4.0 Licence

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-SA 4.0 Licence

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-SA 4.0 Licence

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Voigt condenser microphone
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Voigt condenser microphone
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Voigt condenser microphone
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Voigt condenser microphone
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Voigt condenser microphone
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Voigt condenser microphone, probably made by Voigt Patents Limited, Sydenham, London, England, 1920-1940.

This type of condenser microphone was known as a 'slack diaphragm' microphone. An oval central pillar with a condensing surface was covered in a thin film of insulating material, followed by an extremely thin (only one thousandth of an inch thick) sheet of metal. It was used for a period by the BBC, but was not as sensitive as other types of microphone. There was also a need to keep this type of microphone very dry which, in combination with the poor sensitivity of the device, meant the slack diaphragm microphone was less popular than other types.

Details

Category:
Radio Communication
Object Number:
1960-132
Materials:
brass (copper, zinc alloy), metal and foam
Measurements:
overall: 195 mm x 90 mm diameter, .39 kg
type:
microphone
credit:
Donated by the British Broadcasting Corporation