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IHS ILE ACTUAL TEST SCRIPT WITH SOLVED QUESTIONS AND VERIFIED ANSWERS

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2025/2026 Written for academic year
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IHS ILE ACTUAL TEST SCRIPT WITH SOLVED QUESTIONS AND VERIFIED ANSWERS

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IHS ILE ACTUAL TEST SCRIPT WITH SOLVED
QUESTIONS AND VERIFIED ANSWERS

●● 1892
Answer: -carbon amplifiers patent by Alexander Bell
-marketed 1902-1903 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 :
Answer: transfer vibration from the ossicular chain

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