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

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Ear trumpets. These historical device were designed to help the hard of hearing. The earpieces are at right, with the horns at left. 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: 5130px × 3407px
Photo credit: © ARNO MASSEE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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