Ear trumpets. These historical device were designed to help the hard of hearing. The earpieces are at lower left, with the horns at upper right. They

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Ear trumpets. These historical device were designed to help the hard of hearing. The earpieces are at lower left, with the horns at upper right. They work by amplifying sound as it passes from the horns to the earpieces. Photographed at Leiden University Medical Centre, Leiden, The Netherlands.

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Size: 5070px × 3455px
Photo credit: © ARNO MASSEE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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