Exam (elaborations)
ILE Exam Hearing Aids| 82 questions with complete answers
- Module
- Institution
Hand 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 patent for a telephone type hearing instrument 1920 Correct Answer: l...
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