Twelve Bocas microphone grids

Made:
1916
Twelve Bocas microphone grids in box.

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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