ASTM E1332-22

Standard Classification for Rating Outdoor-Indoor Sound Attenuation

SIGNIFICANCE AND USE
4.1 This classification provides a single number rating for transmission loss or noise reduction data that have been measured or calculated. This rating is based on the difference between the overall A-weighted sound level of the sound spectrum given in Table 1 and the overall A-weighted sound level of the spectrum that results from arithmetically subtracting the transmission loss or noise reduction data from this spectrum. The spectrum shape is an average of three spectra from transportation sources (aircraft takeoff, road traffic, and diesel locomotive). A study showed that this classification correlated well with the A-weighted and loudness reductions (based on ISO 532:1975 in effect at the time) calculated for each of the individual spectra used in developing the rating for the one-third-octave band range of 50 Hz to 5000 Hz. The calculated numeric value of the rating is based on the sound transmission loss or noise reduction values for a particular specimen and depends only on that data and the shape of the reference source spectrum used in the calculation. The values shown in Table 1 have an arbitrary reference level. Use single-number ratings with caution. Specimens having the same rating can result in different indoor spectra depending on the variation of their transmission loss with frequency. Also, if the actual spectrum of the outdoor sound is different from that assumed in Table 1, the overall A-weighted outdoor-indoor noise reduction can be different from the OINIC. The strong low-frequency content of the spectrum in Table 1 means that specimen achieving a high rating must have strong low-frequency transmission loss. Use of this classification with the spectrum in Table 1 in situations where the source does not have a spectrum similar to Table 1 could result in requirements for more low-frequency transmission loss than is necessary for the application. Examples where this can occur are stage 3 jet aircraft, high-speed freeways with sound dominated by ti...
SCOPE
1.1 The purpose of this classification is to provide a method to calculate single-number ratings that can be used for assessing the isolation from outdoor sound provided by a building or comparing building facade specimens including walls, doors, windows, and combinations thereof, including complete structures. These ratings are designed to correlate with subjective impressions of the ability of building elements to reduce the penetration of outdoor ground and air transportation noise that contains strong low-frequency sound.2 These ratings provide an evaluation and rank ordering of the performance of test specimens based on their effectiveness at controlling the sound of a specific outdoor sound spectrum called the reference source spectrum.  
1.2 In addition to the calculation method, this classification provides the definition of the outdoor-indoor transmission class which is not defined elsewhere within ASTM standards. Other standards such as Guide E966 define additional ratings based on the method of this classification, one of which is discussed in this classification.  
1.3 The rating does not necessarily relate to the perceived aesthetic quality of the transmitted sound. Different facade elements with similar ratings differ significantly in the proportion of low and high frequency sound that they transmit, and the spectra of sources can vary significantly. 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.  
1.4 Excluded from the scope of this classification are applications involving noise spectra differing markedly from that shown in Table 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, and any source, including some transportation sources, that does not ...

General Information

• Status: Published
• Publication Date: 31-May-2022
• ICS: 13.040.01 - Air quality in general
• Technical Committee: E33 - Building and Environmental Acoustics
• Drafting Committee: E33.03 - Sound Transmission

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:E1332 −22
Standard Classification for
1
Rating Outdoor-Indoor Sound Attenuation
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 actual spectra of outdoor and indoor sound levels, for making
final selections of facade elements.
1.1 The purpose of this classification is to provide a method
1.4 Excluded from the scope of this classification are
to calculate single-number ratings that can be used for assess-
applications involving noise spectra differing markedly from
ing the isolation from outdoor sound provided by a building or
that shown in Table 1. Thus excluded, for example, would be
comparing building facade specimens including walls, doors,
certain industrial noises with high levels at frequencies below
windows, and combinations thereof, including complete struc-
the 80 Hz one-third octave band, relative to levels at higher
tures. These ratings are designed to correlate with subjective
frequencies, and any source, including some transportation
impressions of the ability of building elements to reduce the
sources, that does not have a spectrum similar to that in Table
penetration of outdoor ground and air transportation noise that
2
1. However, for any source with a spectrum similar to that in
contains strong low-frequency sound. These ratings provide
Table 1, this classification provides a more reliable ranking of
an evaluation and rank ordering of the performance of test
the performance of partitions and facade elements than do
specimens based on their effectiveness at controlling the sound
other classifications such as Classification E413.
of a specific outdoor sound spectrum called the reference
source spectrum.
1.5 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
1.2 In addition to the calculation method, this classification
standard.
providesthedefinitionoftheoutdoor-indoortransmissionclass
which is not defined elsewhere withinASTM standards. Other 1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
standards such as Guide E966 define additional ratings based
on the method of this classification, one of which is discussed responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
in this classification.
mine the applicability of regulatory limitations prior to use.
1.3 The rating does not necessarily relate to the perceived
1.7 This international standard was developed in accor-
aesthetic quality of the transmitted sound. Different facade
dance with internationally recognized principles on standard-
elements with similar ratings differ significantly in the propor-
ization established in the Decision on Principles for the
tion of low and high frequency sound that they transmit, and
Development of International Standards, Guides and Recom-
the spectra of sources can vary significantly. It is best to use
mendations issued by the World Trade Organization Technical
specific sound transmission loss values, in conjunction with
Barriers to Trade (TBT) Committee.
2. Referenced Documents
1
3
This classification is under the jurisdiction of ASTM Committee E33 on
2.1 ASTM Standards:
Building and Environmental Acoustics and is the direct responsibility of Subcom-
mittee E33.03 on Sound Transmission.
Current edition approved June 1, 2022. Published August 2022. Originally
3
approved in 1990. Last previous edition approved in 2016 as E1332 – 16. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/E1332-22. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
2
This classification may be used in conjunction with Test Method E90 or Guide Standards volume information, refer to the standard’s Document Summary page on
E966. the ASTM website.
Copyright © ASTM Internationa
...

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: E1332 − 16 E1332 − 22
Standard Classification for
1
Rating Outdoor-Indoor Sound Attenuation
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 method to calculate single-number ratings that can be used for
assesingassessing the isolation for the from outdoor sound provided by a building or comparing building facade specimens
including walls, doors, windows, and combinations thereof, including complete structures. These ratings are designed to correlate
with subjective impressions of the ability of building elements to reduce the penetration of outdoor ground and air transportation
2
noise that contains strong low-frequency sound. These ratings provide an evaluation and rank ordering of the performance of test
specimens based on their effectiveness at controlling the sound of a specific outdoor sound spectrum called the reference source
spectrum.
1.2 In addition to the calculation method, this classification defines some ratings not defined in other provides the definition of
the outdoor-indoor transmission class which is not defined elsewhere within ASTM standards. Other standards may such as Guide
E966 define additional ratings based on the method of this classification, one of which is discussed in this classification.
1.3 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, and the spectra
of sources can vary significantly. 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.
1.4 Excluded from the scope of this classification are applications involving noise spectra differing markedly from that shown in
Table 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, and any source, including some transportation sources, that does not have a
spectrum similar to that in Table 1. However, for any source with a spectrum similar to that in Table 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
This classification 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 Nov. 1, 2016June 1, 2022. Published December 2016August 2022. Originally approved in 1990. Last previous edition approved in 20102016
as E1332 – 10a.E1332 – 16. DOI: 10.1520/E1332-16.10.1520/E1332-22.
2
This classification may be used in conjunction with Test Method E90 or Guide E966.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E1332 − 22
TABLE 1 Reference Source Spectrum
One-third Octave Band
Center Frequency, Sound Level, dB
Hz
80 103
100 102
125 101
160 98
200 97
250 95
315 94
400 93
500 93
630 91
800 90
1000 89
1250 89
1600 88
2000 88
2500 87
3150 85
4000 84
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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 regula
...