Flat copper disc used for voice recording
- Made:
- 1930
- maker:
- Sherard Osborn Cowper-Coles
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Science Museum Group
© The Board of Trustees of the Science Museum
Flat copper disc used for voice recording known as "Minivoice".Made by Cowper Coles in 1930.
Details
- Category:
- Metallurgy
- Object Number:
- 2002-212
- Materials:
- copper (metal)
- Measurements:
-
: .0394 x 6.0236 in.; 1 x 153 mm
- type:
- copper disc
- credit:
- Mr. Peter Cowper-Coles.
