Mining Engineering > GATE 2025 > Noise Management
Average noise level at a working place is 80 dB(A) for the first 10 minutes and 60 dB(A) for the next 30 minutes. The energy equivalent continuous noise level at the place for the entire period of 40 minutes, in dB(A), is ______ (rounded off to 2 decimal places)
Correct : 73.98
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