ASTM E1111/E1111M-14(2022)
(Test Method)Standard Test Method for Measuring the Interzone Attenuation of Open Office Components
Standard Test Method for Measuring the Interzone Attenuation of Open Office Components
SIGNIFICANCE AND USE
5.1 Providing speech privacy in open-plan spaces depends upon many factors, the most significant of which are the following: (1) the shadow zone of part-height space dividers and the diffraction of sound from the edges of space dividers; (2) the primary sound reflective properties of the ceiling system; (3) the level of masking sound present in the space; and (4) the distance between speaker and listener. Guide E1374 provides additional detail on the factors contributing to speech privacy in open-plan spaces.
5.2 In this test method the third factor, masking sound, is eliminated and the fourth factor, the distance between speaker and listener, is standardized for all specimen types. For the measurement of ceiling systems, the first factor, the shadow zone, is also standardized for each divider height used. Experience has indicated that results obtained by this test method may not fairly represent the speech privacy that may be achievable with non-flat ceiling systems. For the measurement of furniture panels used as acoustical barriers, the second of these factors, the sound reflectance of the ceiling, is standardized. For the measurement of reflective and absorptive vertical surfaces used as wall finishings or furniture panels, the first and second factors are standardized and all paths between the speaker and listener reflecting only off of the ceiling are eliminated.
5.3 This test method provides standardized techniques to assess the contribution of specific components of an open-plan space. The test method specifies an acoustical testing environment for each component type that isolates its contribution from the contribution of other components, which may in actual open-plan environments contribute significantly to the overall speech privacy.
5.4 The significance of test results obtained by this test method must also be considered with regard to the attainable measurement accuracy. The attainment of speech privacy in the presence of masking sound is cri...
SCOPE
1.1 This test method covers the measurement of the interzone attenuation for three components of open-plan spaces:
1.1.1 Ceiling systems when used in conjunction with partial-height space dividers. This arrangement is commonly used in offices to achieve speech privacy between work zones in the absence of full-height partitions. This test method is applicable to any ceiling configuration, including, for example, a pattern of sound-reflective panels in an otherwise sound-absorptive ceiling. This test method generally requires use of a fixed space divider height of 1.50 m [5 ft]. In recognition of trends toward alternate divider heights in open office environments, measurements with an alternate divider height may be conducted in accordance with this standard.
1.1.2 Furniture panels used as acoustical barriers in open-plan spaces to provide speech privacy or sound isolation between working positions.
1.1.3 Vertical panels, including wall finishes such as sound-absorbent panels, and furniture panels or screens which may reflect sound. It may not be applicable to such items as window finishes or furniture other than panels if these differ significantly from flat wall panels.
1.1.4 The combination of results from the various components of an open-plan office is beyond the scope of this standard.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.3 Unless otherwise qualified, all dimensions specified in this test method shall be understood to have a tolerance of ±6 mm (±1/4 in.) The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.4 This standa...
General Information
Standards Content (Sample)
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: E1111/E1111M − 14 (Reapproved 2022)
Standard Test Method for
Measuring the Interzone Attenuation of Open Office
1
Components
This standard is issued under the fixed designation E1111/E1111M; 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 describes the measurement and evaluation of acoustical performance of
components affecting speech privacy in open-plan spaces. The maximum privacy theoretically
availableatnormalworkingdistancesinopen-planspaces,withpartialheightspacedividers(screens),
isinsufficientwithouttheassistanceofrelativelyelevatedbackgroundmaskingsoundlevels.Thus,the
provision of adequate speech privacy in open-plan offices and schools is one of the most difficult tasks
in the architectural acoustics field. This test method provides a means of objectively measuring the
relevant acoustical characteristics of three major components of open-plan spaces, the ceiling system,
furniture panels used as acoustical barriers, and wall finishes which attenuate reflected sound.
Furniture panels may be tested for their capacity as an acoustical barrier and/or the degree to which
they may reduce reflected sound.
1. Scope finishes or furniture other than panels if these differ signifi-
cantly from flat wall panels.
1.1 This test method covers the measurement of the inter-
1.1.4 The combination of results from the various compo-
zone attenuation for three components of open-plan spaces:
nents of an open-plan office is beyond the scope of this
1.1.1 Ceiling systems when used in conjunction with
partial-height space dividers. This arrangement is commonly standard.
used in offices to achieve speech privacy between work zones
1.2 The values stated in either SI units or inch-pound units
in the absence of full-height partitions. This test method is
are to be regarded separately as standard. The values stated in
applicable to any ceiling configuration, including, for example,
each system are not necessarily exact equivalents; therefore, to
a pattern of sound-reflective panels in an otherwise sound-
ensure conformance with the standard, each system shall be
absorptive ceiling. This test method generally requires use of a
used independently of the other, and values from the two
fixed space divider height of 1.50 m [5 ft]. In recognition of
systems shall not be combined.
trends toward alternate divider heights in open office
environments, measurements with an alternate divider height
1.3 Unless otherwise qualified, all dimensions specified in
may be conducted in accordance with this standard.
this test method shall be understood to have a tolerance of 66
1.1.2 Furniture panels used as acoustical barriers in open-
1
mm (6 ⁄4 in.) The values stated in SI units are to be regarded
plan spaces to provide speech privacy or sound isolation
as the standard. The values given in parentheses are provided
between working positions.
for information only.
1.1.3 Vertical panels, including wall finishes such as sound-
1.4 This standard does not purport to address all of the
absorbent panels, and furniture panels or screens which may
safety concerns, if any, associated with its use. It is the
reflectsound.Itmaynotbeapplicabletosuchitemsaswindow
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE33onBuilding
mine the applicability of regulatory limitations prior to use.
and Environmental Acoustics and is the direct responsibility of Subcommittee
E33.02 on Speech Privacy.
1.5 This international standard was developed in accor-
Current edition approved April 1, 2022. Published April 2022. Originally
dance with internationally recognized principles on standard-
approved in 1986. Last previous edition approved in 2014 as E1111/E1111M – 14.
DOI: 10.1520/E1111_E1111M-14R22. ization established in the Decision on Principles for the
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1111/E1111M − 14 (2022)
Development of International Standards, Guides and Recom- point in question and for two adjacent positions 0.30 m (1 ft)
mendations issued by the World Trade Organization Technical along the survey path.
Barriers to Trade (TBT) Committee.
4. Summary of Test Method
2. Referenced Documents
4.1 The test facil
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