ILE Exam Hearing Aids Q&A Verified Latest Update 2024

ILE Exam Hearing Aids Q&A Verified Latest Update 2024 Hand Cupped Behind Ear - Answer --first Hearing Aid -increased sound by 5-8db -included horns,trumpets, speaking tubes 1892 - Answer --carbon amplifiers patent by Alexander Bell -marketed until 1930;first patent for a telephone type hearing instrument 1920 - Answer -large vacuum tubes; not portable 1938 - Answer -miniature vacuum tube ;crystal receivers 1930 - Answer -diameter reduced 1940 - Answer -bone conduction receivers were introduced 1946 - Answer -first telecoil introduced 1950 - Answer -bodyworn HA became convenient size 1948 - Answer -transistor invented 1954 - Answer -eyeglasses aids introduced 1974 - Answer -microphones electrets were introduced 1964 - Answer -intergrated circuit(transistors, resistors, wiring...) 1952 - Answer -first transistors The Most Important function of the oval window is to : - Answ