Three of the first microphones, 1878.

Made:: 1878

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

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