ASTM E492-04
(Test Method)Standard Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine
Standard Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine
SIGNIFICANCE AND USE
The evaluation of the impact sound-insulating performance of a floor-ceiling assembly begins with the measurement of the sound pressure levels in the room below the test specimen. The spectrum of the noise in the room below is determined by the following:
5.1.1 The size and the mechanical properties of the floor-ceiling assembly, such as its construction, surface, mounting or edge restraints, stiffness, or internal damping,
5.1.2 The acoustical response of the room below, and
5.1.3 Inevitably, the characteristics and placement of the object or device producing the impacts and the nature or degree of the actual impact itself.
This test method is based on the use of a standardized tapping machine of the type specified in 8.1.1 and placed in specific positions on the floor. This machine produces a continuous series of uniform impacts at a uniform rate on a test floor and generates in the receiving room broadband sound pressure levels sufficiently high to make accurate and reproducible measurements possible. The tapping machine itself, however, is not designed to simulate any one type of impact, such as produced by male or female footsteps.
Note 1—Caution: Because of its portable design, the tapping machine does not simulate the weight of a human walker. Therefore, the creak or boom of a limber floor assembly caused by such footstep excitation may not be reflected in the single number impact rating derived from test results obtained by this test method. The degree of correlation between the results of tapping machine tests in the laboratory and the overall field performance of floors under typical conditions of domestic impact excitation may be subject to some variation, depending on both the type of floor construction and the nature of the impact excitation.
SCOPE
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 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 This standard does not purport to address 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.
General Information
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Designation: E 492 – 04
Standard Test Method for
Laboratory Measurement of Impact Sound Transmission
Through Floor-Ceiling Assemblies Using the Tapping
1
Machine
This standard is issued under the fixed designation E 492; 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 (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This test method is one of several for evaluating the sound insulating properties of building
elements. It is designed to measure the impact sound transmission performance of an isolated
floor-ceiling assembly, in a controlled laboratory environment. Others in the set deal with field
measurement of impact sound transmission through floor-ceiling assemblies, and the laboratory and
field methods of measuring airborne sound transmission loss of building partitions such as walls,
floor-ceiling assemblies, doors, and other space-dividing elements.
1. Scope 2. Referenced Documents
2
1.1 This test method covers the laboratory measurement of 2.1 ASTM Standards:
impact sound transmission of floor-ceiling assemblies using a C 634 Terminology Relating to Environmental Acoustics
standardized tapping machine. It is assumed that the test E 90 Test Method for Laboratory Measurement ofAirborne
specimen constitutes the primary sound transmission path into Sound Transmission Loss of Building Partitions and Ele-
a receiving room located directly below and that a diffuse ments
sound field exists in this room. E 548 Guide for General Criteria Used for Evaluating
3
1.2 Measurements may be conducted on floor-ceiling as- Laboratory Competence
semblies of all kinds, including those with floating-floor or E 717 Guide for the Preparation of theAccreditationAnnex
suspended ceiling elements, or both, and floor-ceiling assem- of Acoustical Test Standards
blies surfaced with any type of floor-surfacing or floor- E 989 Classification for Determination of Impact Insulation
covering materials. Class (IIC)
1.3 This test method prescribes a uniform procedure for E 2235 Test Method for the Determination of Decay Rates
reporting laboratory test data, that is, the normalized one-third for Use in Sound Insulation Test Methods
octave band sound pressure levels transmitted by the floor- 2.2 ANSI Standards:
ceiling assembly due to the tapping machine. S1.11 Specification for Octave-Band and Fractional-
4
1.4 This standard does not purport to address the safety Octave-Band Analog and Digital Filters
concerns, if any, associated with its use. It is the responsibility S1.26 Method for the Calculation of the Absorption of
4
of the user of this standard to establish appropriate safety and Sound by the Atmosphere
health practices and determine the applicability of regulatory 2.3 ISO Standard:
limitations prior to use.
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
1
This test method is under the jurisdiction of ASTM Committee E33 on Standards volume information, refer to the standard’s Document Summary page on
EnvironmentalAcousticsandisthedirectresponsibilityofSubcommitteeE33.03on the ASTM website.
3
Sound Transmission. Withdrawn
4
Current edition approved April 1, 2004. Published May 2004. Originally Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
e1
approved 1973. Last previous edition approved 1996 as E 492 – 90 (1996) . 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E492–04
ISO 140/6 Acoustics—Measurement of Sound Insulation in 6. Test Rooms
Buildings and of Building Elements Part 6: Laboratory
6.1 Flanking Transmission:
4
Measurements of Impact Sound Insulation of Floors
6.1.1 The test rooms shall be so constructed and arranged
that the test specimen constitutes the only important transmis-
3. Terminology
sion path between them. The impact sound pressure level
3.1 The acoustical terminology used in this method is
transmitted through the test structure shall be at least 10 dB
consistent with Terminology C 634 except for the following
greater than that transmitted into the receiving room by all
special usages.
other paths.
3.2 Definitions of Terms Specific to This Standard:
6.1.2 The limit of impact sound levels that can be measured
3.2.1 receiving room—a reverberant room below the floor
in the receiving room without being biased by flanking
specimen under test in which the sound pressure levels due to
transmission must be determined for each test facility. A
the tapping machine are measured.
sugges
...
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.
´1
Designation:E492–90(Reapproved 1996) Designation: E 492 – 04
Standard Test Method for
Laboratory Measurement of Impact Sound Transmission
Through Floor-Ceiling Assemblies Using the Tapping
1
Machine
This standard is issued under the fixed designation E 492; 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.
1
´ NOTE—Keywords were added editorially in April 1996.
INTRODUCTION
This test method is one of several for evaluating the sound insulating properties of building
elements. It is designed to measure the impact sound transmission performance of an isolated
floor-ceiling assembly, in a controlled laboratory environment. Others in the set deal with field
measurement of impact sound transmission through floor-ceiling assemblies, and the laboratory and
field methods of measuring airborne sound transmission loss of building partitions such as walls,
floor-ceiling assemblies, doors, and other space-dividing elements.
1. Scope
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 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 This standard does not purport to address 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
2.1 ASTM Standards:
C423Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method ASTM
2
Standards:
C 634 Terminology Relating to Environmental Acoustics
E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
3
E 548 Guide for General Criteria Used for Evaluating Laboratory Competence
E 717 Guide for the Preparation of the Accreditation Annex of Acoustical Test Standards
2
E 989 Classification for Determination of Impact Insulation Class (IIC) Classification for Determination of Impact Insulation
Class (IIC)
E 2235 Test Method for the Determination of Decay Rates for Use in Sound Insulation Test Methods
2.2 ANSI Standards:
1
This test method is under the jurisdiction ofASTM Committee E-33 E33 on EnvironmentalAcoustics and is the direct responsibility of Subcommittee E33.03 on Sound
Transmission.
Current edition approved Apr. 27, 1990. Published June 1990. Originally published as E492–73T. Last previous edition E492–86.
´1
Current edition approved April 1, 2004. Published May 2004. Originally approved 1973. Last previous edition approved 1996 as E 492 – 90 (1996) .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 04.06.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Annual Book of ASTM Standards, Vol 14.02.
3
Withdrawn
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E492–04
4
S1.11 Specification for Octave-Band and Fractional-Octave-Band Analog and Digital Filters
4
S1.26 Method for the Calculation of the Absorption of Sound by the Atmosphere
2.3 ISO Standard:
ISO 140/6 Acoustics—Measurement of Sound Insulation in Buildings and of Building Elements Part 6: Laboratory
4
Measurements of Impact Sound Insulation of Floors
3. Terminology
3.1 The acoustical terminology used in this method is consistent with Terminology C 634 except for the following special
usages.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 receiving room—a reverberant room below th
...
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