File:Acousticon - 1906 hearing aid.jpg

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current19:19, 16 January 2011Thumbnail for version as of 19:19, 16 January 20111,106 × 1,280 (553 KB)commons>W Nowicki{{Information |Description={{en|1=Probably from an advertisement for the "Acousticon", the first portable electric hearing aid, invented by Miller Reese Hutchison (1876–1944) in the USA and marketed there and in Europe.}} |Source=page 48 of ''Surdus in

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