Three of the first microphones, 1878.

Made:
1878
Five microphones consisting of wood-charcoal blocks in contact

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Five microphones consisting of wood-charcoal blocks in contact
Science Museum Group
© The Board of Trustees of the Science Musuem

Five microphones consisting of wood-charcoal blocks in contact

Details

Category:
Telecommunications
Object Number:
1922-223
type:
microphones
credit:
Executors of the late Anna C. Hughes