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ASTM E413-22

(Classification)

Classification for Rating Sound Insulation

Classification for Rating Sound Insulation

SIGNIFICANCE AND USE
4.1 These single-number ratings correlate in a general way with subjective impressions of sound transmission for speech, radio, television, and similar sources of noise in offices and buildings. This classification method is not appropriate for sound sources with spectra significantly different from those sources listed above. Such sources include machinery, industrial processes, bowling allies, power transformers, musical instruments, many music systems, and transportation noises such as motor vehicles, aircraft and trains. For these sources, accurate assessment of sound transmission requires a detailed analysis in frequency bands. A single-number sound transmission rating for building façade elements is given in Classification E1332.  
4.2 The single-number ratings obtained can be used to compare the potential sound insulation of partitions or floors tested in laboratory conditions (STC) or the actual sound isolation between different suites in buildings (NNIC, NIC). The rating for a partition built and tested in a building may be lower than that obtained for a partition tested in a laboratory because of flanking transmission or construction errors.
Note 1: A similar rating procedure, described in ISO 717-1:2020, provides single figure sound insulation ratings with a frequency range that extends from 100 to 3150 Hz with no maximum deficiency specified at individual frequencies. For most partitions, the two ratings differ by only one or two points.
SCOPE
1.1 This classification covers methods of calculating single-number acoustical ratings for laboratory and field measurements of sound attenuation obtained in one-third octave bands.  
1.2 The name given to the single-number rating is assigned by the test method that invokes this classification.  
1.3 Test methods that invoke this classification include:  
1.3.1 Test Method E90—The single-number rating is called sound transmission class (STC).  
1.3.2 Test Method E336—Single number ratings are noise isolation class (NIC), normalized noise isolation class (NNIC), and apparent sound transmission class (ASTC).  
1.3.3 Test Method E596—The single-number rating is called noise isolation class (NIC).  
1.3.4 Test Method E1414—The single-number rating is called ceiling attenuation class (CAC).  
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 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.

General Information

Status
Published
Publication Date
31-Mar-2022
ICS
91.120.20 - Acoustics in building. Sound insulation
Technical Committee
E33 - Building and Environmental Acoustics
Drafting Committee
E33.03 - Sound Transmission
Current Stage
Ref Project

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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: E413 −22
Classification for
1
Rating Sound Insulation
This standard is issued under the fixed designation E413; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Sound Transmission Loss of Building Partitions and
Elements
1.1 This classification covers methods of calculating single-
E336 Test Method for Measurement of Airborne Sound
number acoustical ratings for laboratory and field measure-
Attenuation between Rooms in Buildings
ments of sound attenuation obtained in one-third octave bands.
E596 Test Method for Laboratory Measurement of Noise
1.2 The name given to the single-number rating is assigned
Reduction of Sound-Isolating Enclosures
by the test method that invokes this classification.
E1332 Classification for Rating Outdoor-Indoor Sound At-
tenuation
1.3 Test methods that invoke this classification include:
1.3.1 Test Method E90—The single-number rating is called E1414 Test Method for Airborne Sound Attenuation Be-
tween Rooms Sharing a Common Ceiling Plenum
sound transmission class (STC).
3
1.3.2 Test Method E336—Single number ratings are noise
2.2 ISO Standard:
isolation class (NIC), normalized noise isolation class (NNIC),
ISO 717-1:2020 Acoustics — Rating of sound insulation in
and apparent sound transmission class (ASTC).
buildings and of building elements — Part 1: Airborne
1.3.3 TestMethodE596—Thesingle-numberratingiscalled
sound insulation
noise isolation class (NIC).
3. Terminology
1.3.4 Test Method E1414—The single-number rating is
called ceiling attenuation class (CAC).
3.1 The following terms used in this classification are
defined in Terminology C634:
1.4 The values stated in SI units are to be regarded as
airborne sound,
standard. No other units of measurement are included in this
field sound transmission class,
standard.
level,
1.5 This international standard was developed in accor-
noise isolation class,
dance with internationally recognized principles on standard-
noise reduction,
ization established in the Decision on Principles for the
normalized noise isolation class,
Development of International Standards, Guides and Recom-
one-third octave band,
mendations issued by the World Trade Organization Technical
sound insulation,
Barriers to Trade (TBT) Committee.
sound isolation, and
sound transmission loss.
2. Referenced Documents
2
2.1 ASTM Standards:
4. Significance and Use
C634 Terminology Relating to Building and Environmental
4.1 These single-number ratings correlate in a general way
Acoustics
with subjective impressions of sound transmission for speech,
E90 Test Method for Laboratory Measurement of Airborne
radio, television, and similar sources of noise in offices and
buildings. This classification method is not appropriate for
sound sources with spectra significantly different from those
1
This classification is under the jurisdiction of ASTM Committee E33 on
sources listed above. Such sources include machinery, indus-
Building and Environmental Acoustics and is the direct responsibility of Subcom-
mittee E33.03 on Sound Transmission. trial processes, bowling allies, power transformers, musical
Current edition approved April 1, 2022. Published April 2022. Originally
instruments, many music systems, and transportation noises
approved in 1970. Last previous edition approved in 2016 as E413 – 16. DOI:
such as motor vehicles, aircraft and trains. For these sources,
10.1520/E0413-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 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 ----------------------
E413 − 22
accurate assessment of sound transmission requires a detailed 5.3 Fit the reference contour to the data by increasing
analysis in frequency bands. A single-number sound transmis- simultaneously all the values in Table 1 in 1-dB increments
sion rating for building façade elements is given in Classifica- until some of the data are less than the shifted reference
tion E1332. contour.
5.4 At each fr
...

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: E413 − 16 E413 − 22
Classification for
1
Rating Sound Insulation
This standard is issued under the fixed designation E413; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This classification covers methods of calculating single-number acoustical ratings for laboratory and field measurements of
sound attenuation obtained in one-third octave bands.
1.2 The name given to the single-number rating is assigned by the test method that invokes this classification.
1.3 Test methods that invoke this classification include:
1.3.1 Test Method E90—The single-number rating is called sound transmission class (STC).
1.3.2 Test Method E336—Single number ratings are noise isolation class (NIC), normalized noise isolation class (NNIC), and
apparent sound transmission class (ASTC), and field sound transmission class (FSTC).(ASTC).
1.3.3 Test Method E596—The single-number rating is called noise isolation class (NIC).
1.3.4 Test Method E1414—The single-number rating is called ceiling attenuation class (CAC).
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 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.
2. Referenced Documents
2
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 Airborne Sound Attenuation between Rooms in Buildings
E596 Test Method for Laboratory Measurement of Noise Reduction of Sound-Isolating Enclosures
E1332 Classification for Rating Outdoor-Indoor Sound Attenuation
E1414 Test Method for Airborne Sound Attenuation Between Rooms Sharing a Common Ceiling Plenum
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 April 1, 2016April 1, 2022. Published April 2016April 2022. Originally approved in 1970. Last previous edition approved in 20102016 as
E413 – 10.E413 – 16. DOI: 10.1520/E0413-16.10.1520/E0413-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E413 − 22
3
2.2 ISO Standard:
ISO 717717-1:2020 Rating of Sound Insulation for DwellingsAcoustics — Rating of sound insulation in buildings and of
building elements — Part 1: Airborne sound insulation
3. Terminology
3.1 The following terms used in this classification are defined in Terminology C634:
airborne sound,
field sound transmission class,
level,
noise isolation class,
noise reduction,
normalized noise isolation class,
one-third octave band,
sound insulation,
sound isolation, and
sound transmission loss.
4. Significance and Use
4.1 These single-number ratings correlate in a general way with subjective impressions of sound transmission for speech, radio,
television, and similar sources of noise in offices and buildings. This classification method is not appropriate for sound sources with
spectra significantly different from those sources listed above. Such sources include machinery, industrial processes, bowling allies,
power transformers, musical instruments, many music systems, and transportation noises such as motor vehicles, aircraft and
trains. For these sources, accurate assessment of sound transmission requires a detailed analysis in frequency bands. A
single-number sound transmission rating for building façade elements is given in Classification E1332.
4.2 The single-number ratings obtained can be used to compare the
...

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mks acoustic ohm (Pa·s/m3)  
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Standard Terminology Relating to Building and Environmental Acoustics

SIGNIFICANCE AND USE
3.1 Definitions—Terms and related definitions given in Section 4 are intended for use uniformly and consistently in all building and environmental acoustic test standards in which they appear.  
3.2 Definitions of Terms Specific to Each Standard:  
3.2.1 As indicated in Section 4, terms and their definitions are intended to provide a precise understanding and interpretation of the building and environmental acoustic test standards in which they appear.  
3.2.2 A specific definition of a given term is applicable to the standard or standards in which the term is described and used.  
3.2.3 Different definitions of the same term are acceptable provided each one is consistent with and is not in conflict with the standard definition for the same term, that is, the general concept the term describes.  
3.2.4 If a standard under the jurisdiction of ASTM Committee E33 specially defines a term, i.e. provides a definition different in any way from what is given in Section 4 of Terminology C634, that standard shall list the term and its description under the subheading, Definitions of Terms Specific to This Standard.
3.2.4.1 Discussion—The mandatory language of section 3.2.4 is consistent with the mandatory language from §E2 of Form and Style for ASTM Standards (April 2020) and with the ASTM Committee E33 bylaws in place when this standard was published; it reflects a situation that exists, it does not prescribe anything.  
3.3 Definitions for some terms associated with building and environmental acoustic issues and not included in Terminology C634 are found in ISO/TR 25417 or IEEE P260.4. When discrepancies exist, the definition in Terminology C634 shall prevail.
SCOPE
1.1 This terminology covers terms, related definitions, and descriptions of terms used or likely to be used in building and environmental acoustics standards. Definitions of terms are special-purpose definitions that are consistent with the standard definitions but are written to ensure that a specific building and environmental acoustics standard is properly understood and precisely interpreted. The primary focus of this document is upon terms, definitions and descriptions found within standards under the jurisdiction of ASTM Committee E33; however, terms, definitions and descriptions that are of general interest to the field of acoustics are also included.  
1.2 This building and environmental acoustics standard cannot be used to provide quantitative measures.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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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ASTM
ASTM C384-04(2022)(Test Method)
Standard Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method

SIGNIFICANCE AND USE
5.1 The acoustical impedance properties of a sound absorptive material are related to its physical properties, such as airflow resistance, porosity, elasticity, and density. As such, the measurements described in this test method are useful in basic research and product development of sound absorptive materials.  
5.2 Normal incidence sound absorption coefficients are more useful than random incidence coefficients in certain situations. They are used, for example, to predict the effect of placing material in a small enclosed space, such as inside a machine.  
5.3 Estimates of the random incidence or statistical absorption coefficients for materials can be obtained from normal incidence impedance data. For materials that are locally reacting, that is, without sound propagation inside the material parallel to its surface, statistical absorption coefficients can be estimated from specific normal acoustic impedance values using an expression derived by London (1).5 Locally reacting materials include those with high internal losses parallel with the surface such as porous or fibrous materials of high density or materials that are backed by partitioned cavities such as a honeycomb core. Formulas for estimating random incidence sound absorption properties for both locally and bulk-reacting materials, as well as for multilayer systems with and without air spaces have also been developed (2).
SCOPE
1.1 This test method covers the use of an impedance tube, alternatively called a standing wave apparatus, for the measurement of impedance ratios and the normal incidence sound absorption coefficients of acoustical materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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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ASTM
ASTM E1042-22(Classification)
Standard Classification for Acoustically Absorptive Materials Applied by Trowel or Spray

SIGNIFICANCE AND USE
4.1 Acoustically absorptive materials are used for the control of reverberation and echoes in rooms. This standard provides a classification method for acoustically absorptive materials applied directly to surfaces by trowel or by spray.
SCOPE
1.1 This classification covers materials applied by trowel or spray to surfaces for the purpose of increasing their acoustical absorption.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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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ASTM
ASTM E1573-22(Test Method)
Standard Test Method for Measurement and Reporting of Masking Sound Levels Using A-Weighted and One-Third-Octave-Band Sound Pressure Levels

SIGNIFICANCE AND USE
5.1 Acoustical performance is dependent on many factors (see Guide E1374 for a discussion on general office acoustical considerations). One of these factors is the masking sound. The masking spectrum shape and level must conform within specified tolerances throughout the treated area. The measurement and recording of these parameters are addressed in this test method.  
5.2 The results from this test method are used to determine if the masking sound meets a particular specification.
SCOPE
1.1 This test method specifies the procedure used to measure the masking sound in terms of A-weighted and one-third-octave-band sound pressure levels.  
1.2 The results of this test method can be used to determine if and where the masking sound meets (or does not meet) a particular specification.  
1.3 This test method does not evaluate the overall acoustical environment. It is intended only to measure and report the masking sound levels.  
1.4 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only.  
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.  
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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