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Question
State the main components of a hearing aid.
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Solution
The main components of hearing aid are microphone , amplifier and earphone.
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RELATED QUESTIONS
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
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