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
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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)

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