Deafness in Disguise

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1855 patent drawing
Patent illustration for Edward G. Hyde’s Acoustic Auricles, 1855. Hyde’s patent application read, “My improvement consists in intersecting the tube of an ear-trumpet or acoustic instrument near where it enters the ear with a passage communicating with an artificial ear, which resembles or approximates to the form of the human ear and is so arranged as to lead such vibrations as fall on it to unite the vibration passing around through the tube.”