@prefix rdf: . @prefix owl: . @prefix xsd: . @prefix rdfs: . a ; rdfs:isDefinedBy ; rdfs:label "Sound power level"@en ; "Sound Power Level abbreviated as $SWL$ expresses sound power more practically as a relation to the threshold of hearing - 1 picoW - in a logarithmic scale."^^ ; , , , , , ; ; "http://en.wikipedia.org/wiki/Sound_power#Sound_power_level"^^xsd:anyURI ; "$L_W = 10 \\log_{10} \\frac{P}{P_0} dB$, where $P$ is sound power and the reference value is $P_0 =1pW$."^^ ; "L" ; "belongs to SOQ-ISO" .