SSC JE Civil 15 Nov 2022 Shift 2 Solved Paper

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Question : 137 of 200

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While raising a barrier wall between noise source and noise receiving end to reduce noise level at the receiving end, the noise reduction in decibel:

depends on the height of the barrier wall
does not follow a logarithmic function
is directly proportional to the distance between the barrier and the receiving end
is directly proportional to the wavelength of sound

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