Logarithmic Addition of Sound Levels

In order to determine the resultant sound pressure level (SPL) of multiple sources the SPLs must be added logarithmically. This calculation assumes that the SPL of each source running in isolation is known at a given measurement point.

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Please note that this or any other calculators on the wkcgroup.com tools room are for information only. WKC Group has endeavoured to ensure that the information presented here is accurate and that the calculations are correct, but will not accept responsibility for any consequential damages, faults or human errors that may arise from the use of formulas, inventories and values.