ASTM C634-13e1
(Terminology)Standard Terminology Relating to Building and Environmental Acoustics
Standard Terminology Relating to Building and Environmental Acoustics
SCOPE
1.1 This terminology covers terms and definitions related to environmental acoustics. Only definitions common to two or more standards under the jurisdiction of Committee E33 are listed here. The purpose of this terminology is to promote uniformity of key definitions. Definitions pertinent to only one standard and exceptions to the definitions listed below are contained in the individual standards and should be used when following those standards.
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´1
Designation: C634 − 13
Standard Terminology Relating to
1
Building and Environmental Acoustics
This standard is issued under the fixed designation C634; 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.
1
ε NOTE—Editorial corrections made throughout in October 2016.
INTRODUCTION
Insomeoftheentries,thosethataremeasuresofphysicalquantities,thetermisfollowedbyseveral
items: an abbreviation or a symbol, or both, the dimensions of quantities, the measurement units, and
the part of speech.The abbreviation, where applicable, indicates the term as typically referenced.The
symbol stands for the magnitude of the quantity in mathematical expressions. The dimensions of a
quantity express its measure in terms of three fundamental quantities: M for mass, L for length, and
T for time. Speed, for instance, is the quotient obtained when the distance an object moves is divided
−1
by the time involved. The dimensions are [LT ], the negative exponent indicating division. The
measurement units are consistently in SI, Le Système International d’Unités.Those still using the cgs
(centimetre-gram-second) or the inchpound system of units are referred for most of the conversion
factors to IEEE/ ASTM SI 10. Some conversion factors are listed in Section 5 of this document for
convenient reference.
Thedimensionsofaquantityarethesameregardlessoftheunitsinwhichthequantityismeasured.
−1
Speed has the dimensions [LT ] whether it is measured in miles per hour, feet per second, or metres
per second. Quantities with different dimensions are not the same. Flow resistance and specific flow
resistance, for instance, are quantities of different kinds even though the names are similar. On the
other hand, quantities with the same dimensions are not necessarily of the same kind. Sound energy
−1 −2
density, for instance, has the same dimensions as sound pressure, [ML T ], but it is not a kind of
2
sound pressure. Nor is absorption with the dimensions [L ] a kind of area.
1. Scope C367Test Methods for Strength Properties of Prefabricated
Architectural Acoustical Tile or Lay-In Ceiling Panels
1.1 This terminology covers terms and definitions related to
C384Test Method for Impedance andAbsorption ofAcous-
environmental acoustics. Only definitions common to two or
tical Materials by Impedance Tube Method
more standards under the jurisdiction of Committee E33 are
C423TestMethodforSoundAbsorptionandSoundAbsorp-
listed here. The purpose of this terminology is to promote
tion Coefficients by the Reverberation Room Method
uniformity of key definitions. Definitions pertinent to only one
C522Test Method for Airflow Resistance of Acoustical
standard and exceptions to the definitions listed below are
contained in the individual standards and should be used when Materials
C635Specification for the Manufacture, Performance, and
following those standards.
Testing of Metal Suspension Systems for Acoustical Tile
2. Referenced Documents
and Lay-in Panel Ceilings
2
2.1 ASTM Standards:
C636Practice for Installation of Metal Ceiling Suspension
Systems for Acoustical Tile and Lay-In Panels
1 E90Test Method for Laboratory Measurement of Airborne
This terminology is under the jurisdiction of ASTM Committee E33 on
Building and Environmental Acoustics and is the direct responsibility of Subcom-
Sound Transmission Loss of Building Partitions and
mittee E33.07 on Definitions and Editorial.
Elements
Current edition approved Sept. 1, 2013. Published December 2013. Originally
E336Test Method for Measurement of Airborne Sound
approved in 1969. Last previous edition approved in 2011 as C634–11. DOI:
10.1520/C0634-13E01.
Attenuation between Rooms in Buildings
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
E413Classification for Rating Sound Insulation
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
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---------------------- Page: 1 ----------------------
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C634 − 13
E477Test Method for Laboratory Measurements of Acous- E1573Test Method for Evaluating Masking Sound in Open
ticalandAirflowPerformanceofDuctLinerMaterialsand Offices Using A-Weighted and One-Third Octave Band
Sound Pressure Levels
Prefabricated Silencers
E1574Test Method for Measurement of Sound in Residen-
E492Test Method for Laboratory Measurement of Impact
tial Spaces
Sound Transmission Through Floor-Ceiling Assemblies
E1686Guide for Applying Environmental Noi
...
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: C634 − 13 C634 − 13
Standard Terminology Relating to
1
Building and Environmental Acoustics
This standard is issued under the fixed designation C634; 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
ε NOTE—Editorial corrections made throughout in October 2016.
INTRODUCTION
In some of the entries, those that are measures of physical quantities, the term is followed by three
items: symbol, dimensions, and unit. The symbol, in italics, several items: an abbreviation or a
symbol, or both, the dimensions of quantities, the measurement units, and the part of speech. The
abbreviation, where applicable, indicates the term as typically referenced. The symbol stands for the
magnitude of the quantity in mathematical expressions. The dimensions of a quantity express its
measure in terms of three fundamental quantities: M for mass, L for length, and T for time. Speed, for
instance, is the quotient obtained when the distance an object moves is divided by the time involved.
−1
The dimensions are [LT ], the negative exponent indicating division. The unit is measurement units
are consistently in SI, Le Système International d’Unités. Those still using the cgs (centimetre-gram-
second) or the inchpound system of units are referred for most of the conversion factors to IEEE/
ASTM SI 10. A few Some conversion factors are listed in Section 45 of this terminology.document
for convenient reference.
The dimensions of a quantity are the same regardless of the units in which the quantity is measured.
−1
Speed has the dimensions [LT ] whether it is measured in miles per hour, feet per second, or metres
per second. Quantities with different dimensions are not the same. Flow resistance and specific flow
resistance, for instance, are quantities of different kinds even though the names are similar. On the
other hand, quantities with the same dimensions are not necessarily of the same kind. Sound energy
−1 −2
density, for instance, has the same dimensions as sound pressure, [ML T ], but it is not a kind of
2
sound pressure. Nor is absorption with the dimensions [L ] a kind of area.
1. Scope
1.1 This terminology covers terms and definitions related to environmental acoustics. Only definitions common to two or more
standards under the jurisdiction of Committee E33 are listed here. The purpose of this terminology is to promote uniformity of key
definitions. Definitions pertinent to only one standard and exceptions to the definitions listed below are contained in the individual
standards and should be used when following those standards.
2. Referenced Documents
2
2.1 ASTM Standards:
C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
C367 Test Methods for Strength Properties of Prefabricated Architectural Acoustical Tile or Lay-In Ceiling Panels
C384 Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method
C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
C522 Test Method for Airflow Resistance of Acoustical Materials
C635 Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in
Panel Ceilings
1
This terminology is under the jurisdiction of ASTM Committee E33 on Building and Environmental Acoustics and is the direct responsibility of Subcommittee E33.07
on Definitions and Editorial.
Current edition approved Sept. 1, 2013. Published December 2013. Originally approved in 1969. Last previous edition approved in 2011 as C634 – 11. DOI:
10.1520/C0634-13.10.1520/C0634-13E01.
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 ----------------------
´1
C634 − 13
C636 Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels
C667 Specification for Prefabricated Reflective Insulation Systems for Equipment and Pipe Operating at Temperatures above
Ambient Air
C871 Test Methods for Chem
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