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Calculation of the sound pressure level

... Several of the same sound sources

Overall sound pressure level Lp

>0 dB(A)

... Several dissimilar sound sources

Overall sound pressure level Lp

0 dB(A)

Did you know that the sound pressure level is reduced by 12 dB (A) at a distance of 5 m from the noise source? A sound pressure reduction of 10 dB (A) is perceived as half as loud.