@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t8-14>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "8-14" ;
  skosxl:prefLabel "sound pressure level"@en ;
  skosxl:altLabel "L_p"@en ;
  skos:definition "quantity given by:\n\n[stem%unnumbered]\n++++\nL_p = 10 \"lg\" (p_\"RMS\"^2)/(p_0^2) \" dB\"\n++++\n\nwhere stem:[p_\"RMS\"] is the root-mean-square sound pressure in the time domain and stem:[p_0] is the reference value of sound pressure\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-8> ;
  isq:hasUnit [
    skos:notation stem:["dB"] ;
    skosxl:prefLabel "decibel"@en
  ] ;
  skos:note "For sound in air and other gases, the reference value of sound pressure is given by stem:[p_0 = 20 \"unitsml(uPa)\"]. For sound in water and other liquids, the reference value of sound pressure is given by stem:[p_0 = 1 \"unitsml(uPa)\"]. When stating a value of sound pressure level, the reference value shall be specified.\n\nThe value of sound pressure level depends on the selected frequency range and time duration. When stating a value of sound pressure level, the frequency range and time duration shall be specified.\n\nIn accordance with <<iso80000-1>>, any attachment to the unit symbol as a means of giving information about the special nature of the quantity or context of measurement under consideration is not permitted. If specific frequency and time weightings as specified in <<iec61672-1>> or specific frequency bands or time duration are applied, this should be indicated by appropriate subscripts to the quantity symbol.\n\nIn some applications the level of the peak sound pressure is required. This is obtained by replacing the root-mean-square sound pressure, with the instantaneous sound pressure having the greatest absolute value during a stated time interval, in the definition of sound pressure level.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-8:ed-1:en:item:8-14> .