Category:Non-electric hearing aids
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Subcategories
This category has the following 2 subcategories, out of 2 total.
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Media in category "Non-electric hearing aids"
The following 8 files are in this category, out of 8 total.
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Audífono americano de M. Rhodes (1882).jpg 1,044 × 958; 227 KB
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Audífono de cartón de M.D.Colladon (1882).jpg 1,348 × 796; 229 KB
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BeethovenBoneConduction.png 258 × 151; 60 KB
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Bocina o porta-voz (1882).jpg 1,674 × 457; 140 KB
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Hearing aid, London, England, 1900-1940 Wellcome L0057905.jpg 4,012 × 2,832; 950 KB
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Mechanical hearing aids, London, England. Wellcome L0066070.jpg 3,946 × 2,832; 1.21 MB
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Small hearing aid of silver, Paris Wellcome M0018441.jpg 4,169 × 2,530; 1.67 MB
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Speaking or conversation tube Wellcome M0013744.jpg 3,979 × 2,904; 2.23 MB