concept

Acoustics: a carbon microphone invented by D.E. Hughes. Wood engraving by Baud after Broux.

Des applications de téléphone et du microphone a la physiologie & a la clinique / par le Dr. Boudet de Paris.

Galleries and Reading Room

Library

Shop

Café

We’re undertaking some research with website visitors to learn more about how people find access-related information provided by museums. This survey shouldn't take longer than 10 minutes to complete. Thank you for your time!

Microphone

Images

Catalogue

Acoustics: a carbon microphone invented by D.E. Hughes. Wood engraving by Baud after Broux.

Des applications de téléphone et du microphone a la physiologie & a la clinique / par le Dr. Boudet de Paris.