Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

Which of the following sound level existed for maximum duration as per L_Nconcept?

1

L₂₀ = 80 dB

2

L₂₅ = 70 dB

3

L₄₀ = 20 dB

4

L₁₅ = 90 dB

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