Combined Sound Pressure Level

Combined Sound Pressure Level

NO-05
ASPCSPAdvanced

Formula
\[ L_{pt} = 10 \times \log_{10}\left[\sum 10^{L_{pi}/10}\right] \]
When to Use

Calculate the total sound pressure level when multiple noise sources are combined.

Symbol Legend
SymbolMeaningUnitNote
LptCombined sound pressure leveltotal
LpiIndividual sound pressure level of each sourcedB
NNumber of sources

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