@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:t8-1>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "8-1" ;
  skosxl:prefLabel "logarithmic frequency range"@en ;
  skosxl:altLabel "G"@en ;
  skos:definition "quantity given by:\n\n[stem%unnumbered]\n++++\nG = \"lb\"(f_2/f_1) \" oct\" = \"lg\" (f_2/f_1) \" dec\"\n++++\n\nwhere stem:[f_1] and stem:[f_2] are two frequencies (<<iso80000-3>>)\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-8> ;
  isq:hasUnit [
    skos:notation "oct" ;
    skosxl:prefLabel "octet"@en
  ] ;
  isq:hasUnit [
    skos:notation "dec" ;
    skosxl:prefLabel "decimal digit"@en
  ] ;
  skos:note "One octave (stem:[\"oct\"]) is the logarithmic frequency range between stem:[f_1] and stem:[f_2] when stem:[f_2/f_1 = 2]. Similarly, one decade (stem:[\"dec\"]) is the logarithmic frequency range between stem:[f_1] and stem:[f_2] when stem:[f_2/f_1 = 10]; thus stem:[1 \" dec\" = (\"lb\" 10) \" oct\" ~~ 3.322 \" oct\"].\n\n<<iso266>> specifies preferred frequencies for acoustics separated by logarithmic frequency ranges equal to one tenth of a decade (stem:[0.1 \" dec\"]). Each stem:[0.1 \" dec\"] logarithmic frequency range is referred to in <<iso266>> as a \"one-third-octave interval\" because stem:[0.1 \" dec\"] is approximately equal to stem:[1//3 \" oct\"]. Similarly, a logarithmic frequency range of stem:[0.3 \" dec\"] is referred to as a \"one-octave interval\" because stem:[0.3 \" dec\"] is approximately equal to stem:[1 \" oct\"].\n\nA logarithmic frequency range equal to one tenth of a decade can be referred to as a decidecade.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-8:ed-1:en:item:8-1> .