Légende
Illustration from 1878 shows Thomas Edison's megaphone, an early acoustic device for amplifying sound. The device consists of two large funnels for listening and a central funnel for speaking, which should significantly increase the range of the voice, illustration, reproduction from a 19th-century original. Authentic, file restored for optimal use, exact date of submission unknown, historical
Date
08 juin 2026
Crédit
Photo12/ImageBROKER/Sunny Celeste
Notre référence
BRK26H25_296
Model release
Non
Property release
Non
Licence
Libre de droits
Format disponible
105.4Mo (35.1Mo) / 58.8cm x 44.9cm / 6944 x 5304 (300dpi)