Beyer hyperbola loudspeaker, c. 1928

Beyer hyperbola loudspeaker, c. 1928
Science Museum Group
© The Board of Trustees of the Science Musuem

Details

Category:: Radio Communication

Object Number:: 1970-661

type:: loudspeaker

credit:: Gunn, R.D.

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Beyer hyperbola loudspeaker, c. 1928

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