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5 modeles de haut parleurs (haut-parleurs) des annees 1920

5 modeles de haut parleurs (haut-parleurs) des annees 1920
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Medium 1024 × 733 px 87 × 62 mm 619 KB

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Image number
UIS5062468
Image title
5 modeles de haut parleurs (haut-parleurs) des annees 1920
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Artist
Unknown
Location
Science Museum, London, UK
Medium
object
Image description

5 modeles de haut parleurs (haut-parleurs) des annees 1920. De gauche a droite : le Frenophone, le Serling Primax, le Crystavox, un modele de chez S.G. Brown et un de chez Amplion. Photographie. Five loudspeakers, 1920s. Before modern moving-coil loudspeakers, most people listened to the radio on headphones. A speaker, if you had one, would probably have fixed coils driving an iron reed attached to a small diaphragm. The exception here is the Frenophone (left), which incorporates a unique clockwork amplifier. The others (left to right) are: the Serling Primax, with pleated diaphragm; the Crystavox, which drove its reed through an amplifier formed by coupling a telephone receiver to a microphone; a straight horn typespeakers by S G Brown and a speaker made by Amplion. ©SSPL/Science Museum

Photo credit
SSPL/UIG / Bridgeman Images
Image keywords
20th century / twenties / music / gramophone / thing / photography

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