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Communication Systems - Engineering

Communication Systems - Section 1
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Communication Systems - Section 22
Communication Systems - Section 23
Communication Systems - Section 24
Communication Systems - Section 25

Human ear can detect sound intensities of the order of

A 10^-4 W/m²

B 10^-8 W/m²

C 10^-13 W/m²

D 10^-18 W/m²

ANS:C - 10^-13 W/m²

The suitable frequency (audio) is 20Hz-20KHz.

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