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ASTM C367/C367M-22

(Test Method)

Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels

Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels

SIGNIFICANCE AND USE
4.1 Knowledge of hardness is useful in the development and the quality control of acoustical tile and lay-in ceiling panels. Deviation from an established hardness range will assist in pointing out processing errors or defective raw materials, thereby aiding the maintenance of uniform product quality.  
4.2 This property is also useful in comparing the relative abilities of materials to resist indentations on the panel surface caused by impacts.  
4.3 Since the hardness varies with the thickness, only samples of the same thickness shall be directly compared.
SCOPE
1.1 These test methods cover the determination of the strength properties of prefabricated architectural acoustical tile or lay-in ceiling panels as follows:    
Tests  
Sections  
Hardness  
4 to 9    
Friability  
10 to 16  
Sag  
17 to 23  
Transverse strength  
24 to 30  
1.2 Not all of the tests described in these test methods are necessary to evaluate any particular product for a specific use. In each instance, it is necessary to determine which properties are required.  
1.3 These test methods specify procedures that are used in product development, manufacturing control, specification acceptance, and service evaluation.  
1.4 Properties determined by these test methods reflect the performance of the materials under the specific conditions of the test, and do not necessarily indicate performance under conditions other than those specified herein.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems will result in non-conformance with the 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 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
14-May-2022
ICS
91.120.20 - Acoustics in building. Sound insulation
Technical Committee
E33 - Building and Environmental Acoustics
Drafting Committee
E33.04 - Application of Acoustical Materials and Systems
Current Stage
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ASTM C367/C367M-22 - Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling PanelsASTM C367/C367M-22 - Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels
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REDLINE ASTM C367/C367M-22 - Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling PanelsREDLINE ASTM C367/C367M-22 - Standard Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels
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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: C367/C367M − 22
Standard Test Methods for
Strength Properties of Prefabricated Architectural
1
Acoustical Tile or Lay-In Ceiling Panels
This standard is issued under the fixed designation C367/C367M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Materials used for absorbing sound generally have a porous, low-density structure. In comparison
with many building materials they are relatively fragile. Materials are available that possess adequate
strengthandstabilityandatthesametimeprovidegoodsoundabsorption.Thetestmethodsdescribed
here cover procedures for evaluating those physical properties related to strength.The methods are of
use in developing, manufacturing, and selecting acoustical tile or lay-in panels.
Keep in mind that a property related to strength is only one of several considerations important in
judging the usefulness of an acoustical material. For example, a material judged to be quite weak by
one of these tests is still desired for other reasons, and with adequate precautions, is shipped and
installed successfully.
1. Scope shall be used independently of the other. Combining values
from the two systems will result in non-conformance with the
1.1 These test methods cover the determination of the
standard.
strength properties of prefabricated architectural acoustical tile
1.6 This standard does not purport to address all of the
or lay-in ceiling panels as follows:
safety concerns, if any, associated with its use. It is the
Tests Sections
Hardness 4 to 9 responsibility of the user of this standard to establish appro-
Friability 10 to 16
priate safety, health, and environmental practices and deter-
Sag 17 to 23
mine the applicability of regulatory limitations prior to use.
Transverse strength 24 to 30
1.7 This international standard was developed in accor-
1.2 Not all of the tests described in these test methods are
dance with internationally recognized principles on standard-
necessary to evaluate any particular product for a specific use.
ization established in the Decision on Principles for the
In each instance, it is necessary to determine which properties
Development of International Standards, Guides and Recom-
are required.
mendations issued by the World Trade Organization Technical
1.3 These test methods specify procedures that are used in
Barriers to Trade (TBT) Committee.
product development, manufacturing control, specification
acceptance, and service evaluation. 2. Referenced Documents
2
1.4 Properties determined by these test methods reflect the
2.1 ASTM Standards
performance of the materials under the specific conditions of
C634Terminology Relating to Building and Environmental
the test, and do not necessarily indicate performance under
Acoustics
conditions other than those specified herein.
3. Terminology
1.5 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3.1 Terms used in this standard are defined either in Termi-
each system are not exact equivalents; therefore, each system
nology C634 or within this standard. The definition of terms
explicitly given within this standard take precedence over
definitions given in Terminology C634. The definitions within
1
These test methods are under the jurisdiction of ASTM Committee E33 on
Building and EnvironmentalAcoustics and are the direct responsibility of Subcom-
2
mittee E33.04 on Application of Acoustical Materials and Systems. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 15, 2022. Published May 2022. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1955. Last previous edition approved in 2021 as C367/C367M–16 Standards volume information, refer to the standard’s Document Summary page on
(2021). DOI: 10.1520/C0367_C0367M-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C367/C367M − 22
penetrator first contacts the specimen.
Terminology C634 and this standard take precedence over any
other definitions of defined terms found in any other
8.2.1 When possible, the penetrator shall bear between
documents, including other documents that may be referenced
perforations or fissures when testing perforated or fissured
in this standard.
material.
3.2 Defi
...

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: C367/C367M − 16 (Reapproved 2021) C367/C367M − 22
Standard Test Methods for
Strength Properties of Prefabricated Architectural
1
Acoustical Tile or Lay-In Ceiling Panels
This standard is issued under the fixed designation C367/C367M; 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
Materials used for absorbing sound generally have a porous, low-density structure. In comparison
with many building materials they are relatively fragile. Materials are available that possess adequate
strength and stability and at the same time provide good sound absorption. The test methods described
here cover procedures for evaluating those physical properties related to strength. The methods are of
use in developing, manufacturing, and selecting acoustical tile or lay-in panels.
Keep in mind that a property related to strength is only one of several considerations important in
judging the usefulness of an acoustical material. For example, a material judged to be quite weak by
one of these tests is still desired for other reasons, and with adequate precautions, is shipped and
installed successfully.
1. Scope
1.1 These test methods cover the determination of the strength properties of prefabricated architectural acoustical tile or lay-in
ceiling panels as follows:
Tests Sections
Hardness 4 to 9
Friability 10 to 16
Sag 17 to 23
Transverse strength 24 to 30
1.2 Not all of the tests described in these test methods are necessary to evaluate any particular product for a specific use. In each
instance, it is necessary to determine which properties are required.
1.3 These test methods specify procedures that are used in product development, manufacturing control, specification acceptance,
and service evaluation.
1.4 Properties determined by these test methods reflect the performance of the materials under the specific conditions of the test,
and do not necessarily indicate performance under conditions other than those specified herein.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
1
These test methods are under the jurisdiction of ASTM Committee E33 on Building and Environmental Acoustics and are the direct responsibility of Subcommittee
E33.04 on Application of Acoustical Materials and Systems.
Current edition approved Jan. 1, 2021May 15, 2022. Published February 2021May 2022. Originally approved in 1955. Last previous edition approved in 20162021 as
C367/C367M – 16.C367/C367M – 16 (2021). DOI: 10.1520/C0367_C0367M-16R21.10.1520/C0367_C0367M-22.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C367/C367M − 22
system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two
systems will result in non-conformance with the 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 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
3. Terminology
3.1 Terms defined used in this standard are defined either in Terminology C634 or within this standard. The definition of terms
explicitly given within this standard take precedence over definitions given in Terminology C634. The definitions within
Terminology C634. and this standard take precedence over any other definitions of defined terms found in any other documents,
including other documents that may be referenced in this standard.
3.1.1 acoustical material
3.1.2 sound absorption
3.2 Definitions of Terms Specific to This Standard:
3.2.1 fissures—fissures, n—irregular depressions of varying lengths widths,
...

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FIG. 1 Direct (D) and Some Indirect or Flanking Paths (F and Dotted) in a Building  
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1.1 This test method covers the laboratory measurement of impact sound transmission of floor-ceiling assemblies using a standardized tapping machine. It is assumed that the test specimen constitutes the primary sound transmission path into a receiving room located directly below and that a good approximation to a diffuse sound field exists in this room.  
1.2 Measurements may be conducted on floor-ceiling assemblies of all kinds, including those with floating-floor or suspended ceiling elements, or both, and floor-ceiling assemblies surfaced with any type of floor-surfacing or floor-covering materials.  
1.3 This test method prescribes a uniform procedure for reporting laboratory test data, that is, the normalized one-third octave band sound pressure levels transmitted by the floor-ceiling assembly due to the tapping machine.  
1.4 Laboratory Accreditation—The requirements for accrediting a laboratory for performing this test method are given in Annex A2.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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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.  
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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.  
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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.  
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ASTM C634-22(Terminology)
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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