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ASTM E413-16

(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, 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), apparent sound transmission class (ASTC), and field sound transmission class (FSTC).  
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.

General Information

Status
Historical
Publication Date
31-Mar-2016
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E413 −16
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 E1332 Classification for Rating Outdoor-Indoor Sound At-
tenuation
1.1 This classification covers methods of calculating single-
E1414 Test Method for Airborne Sound Attenuation Be-
number acoustical ratings for laboratory and field measure-
tween Rooms Sharing a Common Ceiling Plenum
ments of sound attenuation obtained in one-third octave bands.
3
2.2 ISO Standard:
1.2 The name given to the single-number rating is assigned
ISO 717 Rating of Sound Insulation for Dwellings
by the test method that invokes this classification.
3. Terminology
1.3 Test methods that invoke this classification include:
1.3.1 Test Method E90—The single-number rating is called
3.1 The following terms used in this classification are
sound transmission class (STC).
defined in Terminology C634:
1.3.2 Test Method E336—Single number ratings are noise
airborne sound,
isolation class (NIC), normalized noise isolation class (NNIC),
field sound transmission class,
apparent sound transmission class (ASTC), and field sound
level,
transmission class (FSTC).
noise isolation class,
1.3.3 TestMethodE596—Thesingle-numberratingiscalled
noise reduction,
noise isolation class (NIC).
normalized noise isolation class,
1.3.4 Test Method E1414—The single-number rating is
one-third octave band,
called ceiling attenuation class (CAC).
sound insulation,
sound isolation, and
1.4 The values stated in SI units are to be regarded as
sound transmission loss.
standard. No other units of measurement are included in this
standard.
4. Significance and Use
2. Referenced Documents
4.1 These single-number ratings correlate in a general way
2
with subjective impressions of sound transmission for speech,
2.1 ASTM Standards:
radio, television, and similar sources of noise in offices and
C634 Terminology Relating to Building and Environmental
buildings. This classification method is not appropriate for
Acoustics
sound sources with spectra significantly different from those
E90 Test Method for Laboratory Measurement of Airborne
sources listed above. Such sources include machinery, indus-
Sound Transmission Loss of Building Partitions and
trial processes, bowling allies, power transformers, musical
Elements
instruments, many music systems, and transportation noises
E336 Test Method for Measurement of Airborne Sound
such as motor vehicles, aircraft and trains. For these sources,
Attenuation between Rooms in Buildings
accurate assessment of sound transmission requires a detailed
E596 Test Method for Laboratory Measurement of Noise
analysis in frequency bands. A single-number sound transmis-
Reduction of Sound-Isolating Enclosures
sion rating for building façade elements is given in Classifica-
tion E1332.
1
This classification is under the jurisdiction of ASTM Committee E33 on
4.2 The single-number ratings obtained can be used to
Building and Environmental Acoustics and is the direct responsibility of Subcom-
mittee E33.03 on Sound Transmission.
compare the potential sound insulation of partitions or floors
Current edition approved April 1, 2016. Published April 2016. Originally
tested in laboratory conditions (STC) or the actual sound
approved in 1970. Last previous edition approved in 2010 as E413 – 10. DOI:
isolation between different suites in buildings (NNIC, NIC).
10.1520/E0413-16.
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 ----------------------
E413−16
The rating for a partition built and tested in a building may be less than the reference contour this is a deficiency; only
lower than that obtained for a partition tested in a laboratory deficiencies are counted in the fitting procedure. Continue to
because of flanking transmission or construction errors. increase the reference contour values to the highest level that
NOTE 1—A similar rating procedure, described in ISO 717, provides
will satisfy the following conditions:
single figure sound i
...

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 − 10 E413 − 16
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 Single number ratings are field sound transmission class (FSTC), noise isolation class
(NIC), and normalized noise isolation class (NNIC).(NNIC), apparent sound transmission class (ASTC), and field sound
transmission class (FSTC).
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.
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
3
2.2 ISO Standard:
ISO 717 Rating of Sound Insulation for Dwellings
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
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 Sept. 1, 2010April 1, 2016. Published October 2010April 2016. Originally approved in 1970. Last previous edition approved in 20042010 as
E413 – 04.E413 – 10. DOI: 10.1520/E0413-10.10.1520/E0413-16.
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.
3
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 ----------------------
E413 − 16
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 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
...

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5.1 Measurement of the sound absorption of a room is part of the procedure for other acoustical measurements, such as determining the sound power level of a noise source or the sound transmission loss of a partition. It is also used in certain calculations such as predicting the sound pressure level in a room when the sound power level of a noise source in the room is known.  
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SIGNIFICANCE AND USE
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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.  
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ASTM C522-03(2022)(Test Method)
Standard Test Method for Airflow Resistance of Acoustical Materials

SIGNIFICANCE AND USE
5.1 The specific airflow resistance of an acoustical material is one of the properties that determine its sound-absorptive and sound-transmitting properties. Measurement of specific airflow resistance is useful during product development, for quality control during manufacture, and for specification purposes.  
5.2 Valid measurements are made only in the region of laminar airflow where, aside from random measurement errors, the airflow resistance (R = P/U) is constant. When the airflow is turbulent, the apparent airflow resistance increases with an increase of volume velocity and the term “airflow resistance” does not apply.  
5.3 The specific airflow resistance measured by this test method may differ from the specific resistance measured by the impedance tube method in Test Method E384 for two reasons. In the presence of sound, the particle velocity inside a porous material is alternating while in this test method, the velocity is constant and in one direction only. Also, the particle velocity inside a porous material is not the same as the linear velocity measured outside the specimen.
SCOPE
1.1 This test method covers the measurement of airflow resistance and the related measurements of specific airflow resistance and airflow resistivity of porous materials that can be used for the absorption and attenuation of sound. Materials cover a range from thick boards or blankets to thin mats, fabrics, papers, and screens. When the material is anisotropic, provision is made for measurements along different axes of the specimen.  
1.2 This test method is designed for the measurement of values of specific airflow resistance ranging from 100 to 10 000 mks rayls (Pa·s/m) with linear airflow velocities ranging from 0.5 mm/s to 50 mm/s and pressure differences across the specimen ranging from 0.1 Pa to 250 Pa. The upper limit of this range of linear airflow velocities is a point at which the airflow through most porous materials is in partial or complete transition from laminar to turbulent flow.  
1.3 A procedure for accrediting a laboratory for the purposes of this test method is given in Annex A1.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4.1 Table 1 is provided for user to convert into cgs units.    
cgs acoustic ohm  
mks acoustic ohm (Pa·s/m3)  
105  
cgs rayl  
mks rayl (Pa·s/m)  
10    
cgs rayl/cm  
mks rayl/m (Pa·s/m2)  
103  
cgs rayl/in.  
mks rayl/m (Pa·s/m2)  
394  
mks rayl/in.  
mks rayl/m (Pa·s/m2)  
39.4  
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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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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