ASTM E1332-10
(Classification)Standard Classification for Determination of Outdoor-Indoor Transmission Class
Standard Classification for Determination of Outdoor-Indoor Transmission Class
SIGNIFICANCE AND USE
This classification provides the A-weighted sound level reduction for a test specimen, based upon the sound spectrum given in Table 1. The spectrum shape is an average of three typical spectra from transportation sources (aircraft takeoff, freeway, and railroad passby). A study showed that this classification correlated well with the A-weighted and loudness reductions (see ISO 532) calculated for each of the typical spectra for the one-third octave band range of 50 to 5000 Hz. The calculated numeric value of OITC is based on the measured sound transmission loss values for a particular building facade and depends only on the shape of the reference source spectrum used in the calculation. The values shown in Table 1 have an arbitrary reference level.
This classification requires sound transmission loss (TL) measurements in one-third octave bands from 80 to 4000 Hz. Due to accuracy limitations given in Test Method E90 and Guide E966, measurements below the 100 Hz one-third octave band are not usually reported. Studies have shown that data in the 80 Hz one-third octave band are necessary to obtain acceptable correlations for transportation sound sources. For the purposes of this classification, measurements of sound transmission loss in the 80 Hz one-third octave band from qualified laboratories are deemed to be of acceptable accuracy.
Users of this classification should recognize that low frequency measurements of sound transmission loss may be affected by the test specimen size or the specimen edge restraints, or both, particularly for small modular specimens such as doors or windows. Consequently, the outdoor-indoor transmission class (OITC) may also be affected by these factors, resulting in some uncertainty of the field performance of assemblies bearing a rating number using this classification, but to what extent is unknown.
SCOPE
1.1 The purpose of this classification is to provide a single-number rating that can be used for comparing building facade designs, including walls, doors, windows, and combinations thereof. This rating is designed to correlate with subjective impressions of the ability of building elements to reduce the overall loudness of ground and air transportation noise. It is intended to be used as a rank ordering device.
1.2 The rating does not necessarily relate to the perceived aesthetic quality of the transmitted sound. Different facade elements with similar ratings may differ significantly in the proportion of low and high frequency sound that they transmit. It is best to use specific sound transmission loss values, in conjunction with actual spectra of outdoor and indoor sound levels, for making final selections of facade elements.
1.3 Excluded from the scope of this classification are applications involving noise spectra differing markedly from those described in 4.1. Thus excluded, for example, would be certain industrial noises with high levels at frequencies below the 80 Hz one-third octave band, relative to levels at higher frequencies. However, for any source with a spectrum similar to those in 4.1, this classification provides a more reliable ranking of the performance of partitions and facade elements than do other classifications such as Classification E413.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: E1332 – 10
Standard Classification for
1
Determination of Outdoor-Indoor Transmission Class
This standard is issued under the fixed designation E1332; 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 classification is part of a set of ratings for the sound isolating properties of materials, building
elements, and structures. It is based on A-weighted reduction of a transportation noise source. Other
ratings include Classification E413 that rates the ability of a partition to reduce speech and other
sounds within a limited frequency range, and Classification E989 that provides a rating method for
comparing the impact-insulation properties of floor-ceiling assemblies.
1. Scope responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 The purpose of this classification is to provide a single-
bility of regulatory limitations prior to use.
number rating that can be used for comparing building facade
designs, including walls, doors, windows, and combinations
2. Referenced Documents
thereof. This rating is designed to correlate with subjective
3
2.1 ASTM Standards:
impressions of the ability of building elements to reduce the
2 C634 Terminology Relating to Building and Environmental
overall loudness of ground and air transportation noise. It is
Acoustics
intended to be used as a rank ordering device.
E90 Test Method for Laboratory Measurement of Airborne
1.2 The rating does not necessarily relate to the perceived
Sound Transmission Loss of Building Partitions and Ele-
aesthetic quality of the transmitted sound. Different facade
ments
elements with similar ratings may differ significantly in the
E413 Classification for Rating Sound Insulation
proportion of low and high frequency sound that they transmit.
E966 Guide for Field Measurements of Airborne Sound
It is best to use specific sound transmission loss values, in
Insulation of Building Facades and Facade Elements
conjunction with actual spectra of outdoor and indoor sound
E989 Classification for Determination of Impact Insulation
levels, for making final selections of facade elements.
Class (IIC)
1.3 Excluded from the scope of this classification are
2.2 ANSI Standard:
applications involving noise spectra differing markedly from
4
S1.4 Specifications for Sound Level Meters
those described in 4.1. Thus excluded, for example, would be
2.3 ISO Standard:
certain industrial noises with high levels at frequencies below
ISO 532 Acoustics–Method for Calculating Loudness
the 80 Hz one-third octave band, relative to levels at higher
4
Level
frequencies. However, for any source with a spectrum similar
to those in 4.1, this classification provides a more reliable
3. Terminology
ranking of the performance of partitions and facade elements
3.1 Definitions—For definitions used in this classification,
than do other classifications such as Classification E413.
see Terminology C634.
1.4 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4. Significance and Use
standard.
4.1 This classification provides the A-weighted sound level
1.5 This standard does not purport to address all of the
reduction for a test specimen, based upon the sound spectrum
safety concerns, if any, associated with its use. It is the
given in Table 1. The spectrum shape is an average of three
1
This classification is under the jurisdiction of ASTM Committee E33 on
Building and Environmental Acoustics and is the direct responsibility of Subcom-
3
mittee E33.03 on Sound Transmission. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2010. Published May 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1990. Last previous edition approved in 2003 as E1332 - 90 (2003). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/E1332-10. the ASTM website.
2 4
This classification may be used in conjunction with Test Method E90 or Guide Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
E966. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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---------------------- Page: 1 ----------------------
E1332 – 10
TABLE 1 Reference Source Spectrum TABLE 2 Worksheet for Calculating OITC
One-third Octave Band Column 1 Column 2 Column 3 Column 4 Column 5 Column 6
Sound Level, dB
Center Freque
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:E1332–90(Reapproved 2003) Designation: E1332 – 10
Standard Classification for
1
Determination of Outdoor-Indoor Transmission Class
This standard is issued under the fixed designation E1332; 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 classification is part of a set of ratings for the sound isolating properties of materials, building
elements, and structures. It is based on A-weighted reduction of a transportation noise source. Other
ratings include Classification E413 that rates the ability of a partition to reduce speech and other
sounds within a limited frequency range, and Classification E989 that provides a rating method for
comparing the impact-insulation properties of floor-ceiling assemblies.
1. Scope
1.1 The purpose of this classification is to provide a single-number rating that can be used for comparing building facade
designs, including walls, doors, windows, and combinations thereof. This rating is designed to correlate with subjective
2
impressions of the ability of building elements to reduce the overall loudness of ground and air transportation noise. It is intended
to be used as a rank ordering device.
1.2 The rating does not necessarily relate to the perceived aesthetic quality of the transmitted sound. Different facade elements
with similar ratings may differ significantly in the proportion of low and high frequency sound that they transmit. It is best to use
specific sound transmission loss values, in conjunction with actual spectra of outdoor and indoor sound levels, for making final
selections of facade elements.
1.3 Excluded from the scope of this classification are applications involving noise spectra differing markedly from those
described in 4.1. Thus excluded, for example, would be certain industrial noises with high levels at frequencies below the 80 Hz
one-third octave band, relative to levels at higher frequencies. However, for any source with a spectrum similar to those in 4.1,
this classification provides a more reliable ranking of the performance of partitions and facade elements than do other
classifications such as Classification E413.
1.4
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 and health practices and determine the applicability of regulatory
limitations prior to use.
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
E413 Classification for Rating Sound Insulation
E966 Guide for Field Measurements of Airborne Sound Insulation of Building Facades and Facade Elements
E989 Classification for Determination of Impact Insulation Class (IIC)
2.2 ANSI Standard:
4
S1.4 Specifications for Sound Level Meters
2.3 ISO Standard:
1
This classification is under the jurisdiction ofASTM Committee E33 on Building and EnvironmentalAcoustics and is the direct responsibility of Subcommittee E33.03
on Sound Transmission.
Current edition approved Oct.April 1, 2003.2010. Published October 2003.May 2010. Originally approved in 1990. Last previous edition approved in 19982003 as E1332
- 90 (1998).(2003). DOI: 10.1520/E1332-90R03.10.1520/E1332-10.
2
This classification may be used in conjunction with Test Method E90 or Guide E966.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E1332 – 10
4
ISO 532 Acoustics–Method for Calculating Loudness Level
3. Terminology
3.1 Definitions—For definitions used in this classification, see Terminology C634.
4. Significance and Use
...
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