Exam (elaborations)
ILE Exam Hearing Aids question with complete correctly answered 2023
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ILE Exam Hearing Aids question with complete correctly answered 2023Hand Cupped Behind Ear - correct answer -first Hearing Aid -increased sound by 5-8db -included horns,trumpets, speaking tubes 1892 - correct answer -carbon amplifiers patent by Alexander Bell -marketed until 1930;first paten...
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