ASTM E1111-07
(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
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 (60 in). 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 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.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:E1111 −07
StandardTest Method for
Measuring the Interzone Attenuation of Open Office
1
Components
This standard is issued under the fixed designation E1111; 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 1.1.4 The combination of results from the various compo-
nents of an open-plan office is beyond the scope of this
1.1 This test method covers the measurement of the inter-
standard.
zone attenuation for three components of open-plan spaces:
1.2 Unless otherwise qualified, all dimensions specified in
1.1.1 Ceiling systems when used in conjunction with
this test method shall be understood to have a tolerance of 66
partial-height space dividers. This arrangement is commonly
1
mm (6 ⁄4 in.) The values stated in SI units are to be regarded
used in offices to achieve speech privacy between work zones
as the standard. The values given in parentheses are provided
in the absence of full-height partitions. This test method is
for information only.
applicable to any ceiling configuration, including, for example,
a pattern of sound-reflective panels in an otherwise sound-
1.3 This standard does not purport to address all of the
absorptive ceiling. This test method generally requires use of a
safety concerns, if any, associated with its use. It is the
fixed space divider height of 1.50 m (60 in). In recognition of
responsibility of the user of this standard to establish appro-
trends toward alternate divider heights in open office
priate safety and health practices and determine the applica-
environments, measurements with an alternate divider height
bility of regulatory limitations prior to use.
may be conducted in accordance with this standard.
2. Referenced Documents
1.1.2 Furniture panels used as acoustical barriers in open-
2
plan spaces to provide speech privacy or sound isolation
2.1 ASTM Standards:
between working positions.
C423 Test Method for SoundAbsorption and SoundAbsorp-
1.1.3 Vertical panels, including wall finishes such as sound-
tion Coefficients by the Reverberation Room Method
absorbent panels, and furniture panels or screens which may
C634 Terminology Relating to Building and Environmental
reflectsound.Itmaynotbeapplicabletosuchitemsaswindow
Acoustics
finishes or furniture other than panels if these differ signifi-
E795 Practices for Mounting Test Specimens During Sound
cantly from flat wall panels.
Absorption Tests
E1110 Classification for Determination ofArticulation Class
E1179 Specification for Sound Sources Used for Testing
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE33onBuilding
and Environmental Acoustics and is the direct responsibility of Subcommittee
2
E33.02 on Speech Privacy. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2007. Published April 2007. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1986. Last previous edition approved in 2005 as E1111 – 05. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E1111-07. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1111 − 07
Open Office Components and Systems 3.3.3 interzone attenuation—at a specified position, for a
E1374 Guide for Open Office Acoustics and Applicable one-third octave band, the difference between the nominal
ASTM Standards reference level and the sound pressure level at the specified
2.2 ANSI Standards: point.
3
S1.4 Specification for Sound Level Meters
3.3.4 nominal interzone attenuation—for a one-third
S1.6 Pr
...
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