# Resolve RDF Terms

quantitykind:SoundPowerLevel
http://qudt.org/vocab/quantitykind/SoundPowerLevel

### Recommended prefix

quantitykind:

lang:en
Sound power level
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Sound Power Level abbreviated as $$SWL$$ expresses sound power more practically as a relation to the threshold of hearing - 10-12 W - in a logarithmic scale.
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http://en.wikipedia.org/wiki/Sound_power#Sound_power_level
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$$L_W = 10 \log_{10} \frac{P}{P_0} dB$$, where $$P$$ is sound power and the reference value is $$P_0 =1pW$$.
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belongs to SOQ-ISO