ASTM E2249-19
(Test Method)Standard Test Method for Laboratory Measurement of Airborne Transmission Loss of Building Partitions and Elements Using Sound Intensity
Standard Test Method for Laboratory Measurement of Airborne Transmission Loss of Building Partitions and Elements Using Sound Intensity
SIGNIFICANCE AND USE
5.1 This test method can be used to obtain an estimate the transmission loss of building elements in a laboratory setting where the source room and the specimen mounting conditions satisfy the requirements of Test Method E90. The acceptability of the receiving room will be determined by a set of field indicators that define the quality and accuracy of the intensity estimate.
5.2 By appropriately constructing the surface over which the intensity is measured it is possible to selectively exclude the influence of sound energy paths including the effects from joints, gaps as well as flanking sound paths. This method may be particularly useful when accurate measurements of a partition can not be made in an Test Method E90 facility because the partition sound insulation is limited by flanking transmission involving facility source and receiver room surfaces, (for example, the path from the source room floor to the receiver room floor via the isolators and the slab supporting the two). Annex A3 discusses this in detail.
5.3 The discrete point method allows the mapping of the radiated sound intensity which can be used to identify defects or unique features (2) of the partition.
5.4 Current research reported in the literature indicate that there exists a bias between measures of transmission loss obtained using the intensity technique and those obtained using the conventional two room reverberation technique (for example, Test Method E90, (3) and (4)). Appendix E provides estimates of the bias that might be expected. Despite the presence of a bias, no corrections are to be applied to the measured data obtained by this test method.
SCOPE
1.1 This test method covers the measurement of airborne sound transmission loss of building partitions such as walls of all kinds, operable partitions, floor-ceiling assemblies, doors, windows, roofs, panels and other space-dividing building elements. It may also be have applications in sectors other than the building industry, although these are beyond the scope.
1.2 The primary quantity reported by this standard is Intensity Transmission Loss (ITL) and shall not be given another name. Similarly, the single-number rating Intensity Sound Transmission Class (ISTC) derived from the measured ITL shall not be given any other name.
1.3 This test method may be used to reveal the sound radiation characteristics of a partition or portion thereof.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: The method for measuring the sound intensity radiated by the building element under test defined by this ASTM standard meets or exceeds those of ISO 15186-1. Special consideration will have to be given to requirements for the source room and specimen mounting if compliance with ISO 15186-1 is also desired as they differ from those of this standard.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E2249 − 19
Standard Test Method for
Laboratory Measurement of Airborne Transmission Loss of
1
Building Partitions and Elements Using Sound Intensity
This standard is issued under the fixed designation E2249; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Thistestmethodispartofasetforevaluatingthesoundtransmissionlossofapartitionorpartition
elementunderlaboratoryconditions.ItdiffersfromTestMethodE90inthatthesoundpowerradiated
by the element under test is measured directly using an intensity probe rather than indirectly from the
space averaged receiver room sound pressure and the room reverberation time. This test method is
especially useful when the receiver room requirements of Test Method E90 can not be achieved, or
flanking sound involving the receiver room surfaces is present but its influence is to be circumvented
2
(1) , as discussed in Annex A3.
Others test methods to evaluate sound insulation of building elements include: Test Method E90,
airbornetransmissionlossofanisolatedpartitionelementinacontrolledlaboratoryenvironment,Test
Method E492, laboratory measurement of impact sound transmission through floors, Test Method
E336, measurement of sound isolation in buildings, Test Method E1007, measurement of impact
sound transmission in buildings, Guide E966, measurement of sound transmission through building
facades and facade elements.
1. Scope 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers the measurement of airborne
responsibility of the user of this standard to establish appro-
sound transmission loss of building partitions such as walls of
priate safety, health, and environmental practices and deter-
all kinds, operable partitions, floor-ceiling assemblies, doors,
mine the applicability of regulatory limitations prior to use.
windows, roofs, panels and other space-dividing building
elements.Itmayalsobehaveapplicationsinsectorsotherthan
NOTE 1—The method for measuring the sound intensity radiated by the
building element under test defined by this ASTM standard meets or
the building industry, although these are beyond the scope.
exceedsthoseofISO15186-1.Specialconsiderationwillhavetobegiven
1.2 The primary quantity reported by this standard is Inten-
torequirementsforthesourceroomandspecimenmountingifcompliance
sity Transmission Loss (ITL) and shall not be given another withISO15186-1isalsodesiredastheydifferfromthoseofthisstandard.
name. Similarly, the single-number rating Intensity Sound
1.6 This international standard was developed in accor-
Transmission Class (ISTC) derived from the measured ITL
dance with internationally recognized principles on standard-
shall not be given any other name.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.3 This test method may be used to reveal the sound
mendations issued by the World Trade Organization Technical
radiation characteristics of a partition or portion thereof.
Barriers to Trade (TBT) Committee.
1.4 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
2. Referenced Documents
standard.
3
2.1 ASTM Standards:
C634Terminology Relating to Building and Environmental
1 Acoustics
ThistestmethodisunderthejurisdictionofASTMCommitteeE33onBuilding
and Environmental Acoustics and is the direct responsibility of Subcommittee
E33.03 on Sound Transmission.
Current edition approved April 1, 2019. Published May 2019. Originally
3
approved in 2002. Last previous edition approved in 2016 as E2249–02 (2016). For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/E2249-19. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Theboldfacenumbersinparenthesesrefertothelistofreferencesattheendof Standards volume information, refer to the standard’s Document Summary page on
this standard. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2249 − 19
E90Test Method for Laboratory Measurement of Airborne where:
Sound Transmission Loss of Building Partitions and
nW = unit normal vector directed out of the volume enclosed
Elements
by the measurement surface.
E336Test Method for Measur
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2249 − 02 (Reapproved 2016) E2249 − 19
Standard Test Method for
Laboratory Measurement of Airborne Transmission Loss of
1
Building Partitions and Elements Using Sound Intensity
This standard is issued under the fixed designation E2249; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This test method is part of a set for evaluating the sound transmission loss of a partition or partition
element under laboratory conditions. It differs from Test Method E90 in that the sound power radiated
by the element under test is measured directly using an intensity probe rather than indirectly from the
space averaged receiver room sound pressure and the room reverberation time. This test method is
especially useful when the receiver room requirements of Test Method E90 can not be achieved, or
flanking sound involving the receiver room surfaces is present but its influence is to be circumvented
2
(1) , as discussed in Annex A3.
Others test methods to evaluate sound insulation of building elements include: Test Method E90,
airborne transmission loss of an isolated partition element in a controlled laboratory environment, Test
Method E492, laboratory measurement of impact sound transmission through floors, Test Method
E336, measurement of sound isolation in buildings, Test Method E1007, measurement of impact
sound transmission in buildings, Guide E966, measurement of sound transmission through building
facades and facade elements.
1. Scope
1.1 This test method covers the measurement of airborne sound transmission loss of building partitions such as walls of all
kinds, operable partitions, floor-ceiling assemblies, doors, windows, roofs, panels and other space-dividing building elements. It
may also be have applications in sectors other than the building industry, although these are beyond the scope.
1.2 The primary quantity reported by this standard is Intensity Transmission Loss (ITL) and shall not be given another name.
Similarly, the single-number rating Intensity Sound Transmission Class (ISTC) derived from the measured ITL shall not be given
any other name.
1.3 This test method may be used to reveal the sound radiation characteristics of a partition or portion thereof.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—The method for measuring the sound intensity radiated by the building element under test defined by this ASTM standard meets or exceeds
those of ISO 15186-1. Special consideration will have to be given to requirements for the source room and specimen mounting if compliance with ISO
15186-1 is also desired as they differ from those of this standard.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
This test method is under the jurisdiction of ASTM Committee E33 on Building and Environmental Acoustics and is the direct responsibility of Subcommittee E33.03
on Sound Transmission.
Current edition approved April 1, 2016April 1, 2019. Published April 2016May 2019. Originally approved in 2002. Last previous edition approved in 20082016 as
E2249 – 02 (2008).(2016). DOI: 10.1520/E2249-02R16.10.1520/E2249-19.
2
The boldface numbers in parentheses refer to the list of references at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2249 − 19
2. Referenced Documents
3
2.1 ASTM Standards:
C634 Terminology Relating to Building and Environmental Acoustics
E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
E336 Test Method for Measurement of Ai
...
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