Gallery›Wellcome Collection›Acoustics: a carbon microphone. Wood engraving by Baud after Broux.
Acoustics: a carbon microphone. Wood engraving by Baud after Broux.
Wellcome Collection

Acoustics: a carbon microphone. Wood engraving by Baud after Broux.

Broux

CC0 — Public Domain
Wellcome Collection

Lettering: Le microphone de Hughes.

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