27.7 MB (11.7 MB compressed)
2923 x 3307 pixels
24.6 x 27.9 cm ⏐ 9.7 x 11.0 in (300dpi)
COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY
Ear trumpet use, 19th-century illustration. Woman speaking into a man's ear trumpet. Ear trumpets are designed to help those with difficulty hearing. They work by amplifying sound. Artwork from 'Hygiene et Medecine Des Deux Sexes' (1890) by French author Alexis Clerc (1841-1894).
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