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What is a sound power level?

April 26, 2017level power sound

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What is a sound power level?

1 Answer

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Sound power level, Lw, is often quoted on machinery to indicate the total sound energy radiated per second. The reference power is taken as 1pW. For example, a lawn mower with sound power level 88dB(A) will produce a sound level of about 60dB(A) at a distance of 10 meters. If the sound power level was 78dB(A) then the lawn mower sound level would be only 50dB(A) at the same distance.