<?xml version="1.0"?>
<PropertySetDef xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" ifdguid="6e4df680d20811e1800000215ad4efdf" templatetype="PSET_TYPEDRIVENOVERRIDE" xsi:noNamespaceSchemaLocation="http://buildingSMART-tech.org/xml/psd/PSD_IFC4.xsd">
  <IfcVersion version="IFC4" />
  <Name>Pset_SoundAttenuation</Name>
  <Definition>Common definition to capture sound pressure at a point on behalf of a device typically used within the context of building services and flow distribution systems.   To indicate sound values from an instance of IfcDistributionFlowElement at a particular location, IfcAnnotation instance(s) should be assigned to the IfcDistributionFlowElement through the IfcRelAssignsToProduct relationship. The IfcAnnotation should specify ObjectType of 'Sound' and geometric representation of 'Annotation Point' consisting of a single IfcPoint subtype as described at IfcAnnotation.  This property set is instantiated multiple times on an object for each frequency band.  HISTORY: New property set in IFC Release 2x4.</Definition>
  <Applicability />
  <ApplicableClasses>
    <ClassName>IfcAnnotation/SOUND</ClassName>
  </ApplicableClasses>
  <ApplicableTypeValue>IfcAnnotation/SOUND</ApplicableTypeValue>
  <PropertyDefs>
    <PropertyDef ifdguid="7443d780d20811e1800000215ad4efdf">
      <Name>SoundScale</Name>
      <Definition>The reference sound scale.  

DBA: Decibels in an A-weighted scale
DBB: Decibels in an B-weighted scale
DBC: Decibels in an C-weighted scale
NC: Noise criteria
NR: Noise rating</Definition>
      <PropertyType>
        <TypePropertyEnumeratedValue>
          <EnumList name="PEnum_SoundScale">
            <EnumItem>DBA</EnumItem>
            <EnumItem>DBB</EnumItem>
            <EnumItem>DBC</EnumItem>
            <EnumItem>NC</EnumItem>
            <EnumItem>NR</EnumItem>
          </EnumList>
          <ConstantList>
            <ConstantDef>
              <Name>DBA</Name>
              <NameAliases>
                <NameAlias lang="en">dB-A</NameAlias>
              </NameAliases>
              <DefinitionAliases>
                <DefinitionAlias lang="en">Decibels in an A-weighted scale</DefinitionAlias>
              </DefinitionAliases>
            </ConstantDef>
            <ConstantDef>
              <Name>DBB</Name>
              <NameAliases>
                <NameAlias lang="en">dB-B</NameAlias>
              </NameAliases>
              <DefinitionAliases>
                <DefinitionAlias lang="en">Decibels in an B-weighted scale</DefinitionAlias>
              </DefinitionAliases>
            </ConstantDef>
            <ConstantDef>
              <Name>DBC</Name>
              <NameAliases>
                <NameAlias lang="en">dB-C</NameAlias>
              </NameAliases>
              <DefinitionAliases>
                <DefinitionAlias lang="en">Decibels in an C-weighted scale</DefinitionAlias>
              </DefinitionAliases>
            </ConstantDef>
            <ConstantDef>
              <Name>NC</Name>
              <NameAliases>
                <NameAlias lang="en">Nc</NameAlias>
              </NameAliases>
              <DefinitionAliases>
                <DefinitionAlias lang="en">Noise criteria</DefinitionAlias>
              </DefinitionAliases>
            </ConstantDef>
            <ConstantDef>
              <Name>NR</Name>
              <NameAliases>
                <NameAlias lang="en">Nr</NameAlias>
              </NameAliases>
              <DefinitionAliases>
                <DefinitionAlias lang="en">Noise rating</DefinitionAlias>
              </DefinitionAliases>
            </ConstantDef>
          </ConstantList>
        </TypePropertyEnumeratedValue>
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Sound Scale</NameAlias>
        <NameAlias lang="ja-JP">騒音の単位</NameAlias>
        <NameAlias lang="ko-KR">소음단위</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
        <DefinitionAlias lang="ja-JP">騒音の単位：

- DBA: dB(A)
- DBB: dB(B)
- DBC:dB(C)
- NC:騒音基準
- NR:騒音評価</DefinitionAlias>
        <DefinitionAlias lang="ko-KR">소음 단위. DBA : dB (A) DBB : dB (B) DBC : dB (C) NC : 소음 기준 NR : 소음 평가</DefinitionAlias>
      </DefinitionAliases>
    </PropertyDef>
    <PropertyDef ifdguid="80c83000d20811e1800000215ad4efdf">
      <Name>SoundFrequency</Name>
      <Definition>List of nominal sound frequencies, correlated to the SoundPressure time series values (IfcTimeSeries.ListValues)</Definition>
      <PropertyType>
        <TypePropertyListValue>
          <ListValue>
            <DataType type="IfcFrequencyMeasure" />
          </ListValue>
        </TypePropertyListValue>
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Sound Frequency</NameAlias>
        <NameAlias lang="ja-JP">音の周波数</NameAlias>
        <NameAlias lang="ko-KR">소리의 주파수</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
        <DefinitionAlias lang="ja-JP">代表的な周波数リスト、時系列音圧値と関連する。（IfcTimeSeriesにリストされた値）</DefinitionAlias>
        <DefinitionAlias lang="ko-KR">대표적인 주파수 목록 시계열 소리 圧値과 관련된다. (IfcTimeSeries에 나열된 값)</DefinitionAlias>
      </DefinitionAliases>
    </PropertyDef>
    <PropertyDef ifdguid="858ce400d20811e1800000215ad4efdf">
      <Name>SoundPressure</Name>
      <Definition>A time series of sound pressure values measured in decibels at a reference pressure of 20 microPascals for the referenced octave band frequency.  Each value in IfcTimeSeries.ListValues is correlated to the sound frequency at the same position within SoundFrequencies.</Definition>
      <PropertyType>
        <TypePropertyReferenceValue reftype="IfcTimeSeries" />
      </PropertyType>
      <NameAliases>
        <NameAlias lang="en">Sound Pressure</NameAlias>
        <NameAlias lang="ja-JP">音圧</NameAlias>
        <NameAlias lang="ko-KR">음압</NameAlias>
      </NameAliases>
      <DefinitionAliases>
        <DefinitionAlias lang="en" />
        <DefinitionAlias lang="ja-JP">時系列の音圧、単位はデシベル。オクターブバンドの音の強さ20mPaを基準する。IfcTimeSeriesにリストされた各値は同じ場所で、同じ周波数バントでの温の周波数と関連する。</DefinitionAlias>
        <DefinitionAlias lang="ko-KR">시계열의 음압 단위는 dB. 옥타브 밴드 소리의 강도 20mPa을 기준한다. IfcTimeSeries에 나열된 각 값은 같은 장소에서 같은 주파수 번트에서 온도의 주파수와 관련.</DefinitionAlias>
      </DefinitionAliases>
    </PropertyDef>
  </PropertyDefs>
  <PsetDefinitionAliases>
    <PsetDefinitionAlias lang="en" />
    <PsetDefinitionAlias lang="ja-JP">建物管理・空気の搬送システムに関連する設備の音圧の性能指標。特定位置からあるIfcDistributionFlowElement設備の音性能値を表すために、IfcRelAssignsToProduct を通してIfcDistributionFlowElementに IfcAnnotation注釈属性値を付ける。 IfcAnnotation属性値は音の種別（ObjectType） と幾何的な代表位置注釈ポイントで構成され、注釈ポイントは IfcAnnotation注釈を入れたIfcPoint一点とする。このPsetは周波数バンド（帯域幅）１HZにおけるある音の強さの倍数で表示する。履歴：IFC２ｘ４に新たに定義された。</PsetDefinitionAlias>
  </PsetDefinitionAliases>
</PropertySetDef>