Twelve Bocas microphone grids

Made:: 1916

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Twelve Bocas microphone grids in box.
Science Museum Group
© The Board of Trustees of the Science Museum

Twelve Bocas microphone grids in box.

Details

Category:: Acoustics

Object Number:: 1922-123

type:: microphone grids

credit:: War Office

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Twelve Bocas microphone grids

Details

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