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(Medicine) a trumpet-shaped instrument used to carry the voice a great distance or held to the ear by a deaf person to aid his hearing
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||speaking trumpet - a trumpet-shaped acoustic device to intensify and direct the human voice; formerly held to the ear by a hard-of-hearing person|
acoustic device - a device for amplifying or transmitting sound
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