#### 8.9.2.27 IfcSoundPressureMeasure

A sound pressure measure is a measure of the pressure fluctuations superimposed over the ambient pressure level with units of pascals.

Type: REAL

> HISTORY New type in IFC2x2, changed in IFC4. See also IfcSoundPressureLevelMeasure for using the unit decibel, i.e. relativ to a reference value.

XSD Specification:

<xs:simpleType name="IfcSoundPressureMeasure">
<xs:restriction base="xs:double"/>
</xs:simpleType>
<xs:element name="IfcSoundPressureMeasure-wrapper" nillable="true">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="ifc:IfcSoundPressureMeasure">
<xs:attributeGroup ref="ifc:instanceAttributes"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>

EXPRESS Specification:

TYPE IfcSoundPressureMeasure = REAL;
END_TYPE;

EXPRESS-G diagram

Link to this page