Noise pollution is measured in decibels (dB) with reference to a stand – McqOptions

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1.	Noise pollution is measured in decibels (dB) with reference to a standard sound intensity of the following magnitude
A.	1 pico watt per m2
B.	1 milliwatt per m2
C.	1 nanowatt per m2
D.	1 microwatt per m2
Answer» B. 1 milliwatt per m2

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