Extendable ear trumpet,circa 1900

Numéro d’image : 11675884
Extendable ear trumpet,circa 1900
Banjo style extendable ear trumpet. Ear trumpets were used to aid those with difficulties in hearing. Sound waves enter the wide 'sound collecting' dome which acts as a parabolic reflector,focusing the sound into the mouth of the extendable tube. The sound becomes amplified as it passes along the narrow tube and into the earpiece. The tip of the earpiece is placed in the ear canal of the user,amplification of the sound makes it easier to hear. This piece is in faux tortoiseshell,it is made of celluloid and dates from around 1900,England
Licence : Droits gérés
Crédit: Science Photo Library
Taille de l’image : 5199 px × 3361 px
Model Release : Non requis
Property Release : Non requis
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