Noise Pollution Level Calculator

Level exceeded 10 Percent of Time(L10) = dB
Level exceeded 50 Percent of Time(L50) = dB
Level exceeded 90 Percent of Time(L90) = dB
Results:
Noise Pollution Level(NPL) = dB

Noise pollution is excessive noise. it may harm the activity or balance of human or animal life.

Noise Pollution Level formula:

NPL ＝ L50+L10－L90+（L10-L90)2/60

where, NPL = Noise Pollution Level, L90 = Level exceeded 90 Percent of Time, L50 = Level exceeded 50 Percent of Time, L10 = Level exceeded 10 Percent of Time

For example, when Level exceeded 10 Percent of Time(L10) = 2 dB, Level exceeded 50 Percent of Time(L50) = 3 dB, Level exceeded 90 Percent of Time(L90) = 4 dB, then Noise Pollution Level(NPL) = 1.0667dB.

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