ASTM C634-13
(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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Designation: C634 − 13
StandardTerminology 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.
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, 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. The dimensions are
−1
[LT ], the negative exponent indicating division. The unit is consistently in SI, Le Système
Internationald’Unités.Thosestillusingthecgs(centimetre-gram-second)ortheinchpoundsystemof
units are referred for most of the conversion factors to IEEE/ASTM SI 10.Afew conversion factors
are listed in Section 4 of this terminology.
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 Architectural Acoustical Tile or Lay-In Ceiling Panels
C384Test Method for Impedance andAbsorption ofAcous-
1.1 This terminology covers terms and definitions related to
tical Materials by Impedance Tube Method
environmental acoustics. Only definitions common to two or
C522Test Method for Airflow Resistance of Acoustical
more standards under the jurisdiction of Committee E33 are
Materials
listed here. The purpose of this terminology is to promote
C635Specification for the Manufacture, Performance, and
uniformity of key definitions. Definitions pertinent to only one
Testing of Metal Suspension Systems for Acoustical Tile
standard and exceptions to the definitions listed below are
and Lay-in Panel Ceilings
contained in the individual standards and should be used when
C636Practice for Installation of Metal Ceiling Suspension
following those standards.
Systems for Acoustical Tile and Lay-In Panels
2. Referenced Documents C667Specification for Prefabricated Reflective Insulation
2
Systems for Equipment and Pipe Operating at Tempera-
2.1 ASTM Standards:
tures above Ambient Air
C423TestMethodforSoundAbsorptionandSoundAbsorp-
C871Test Methods for ChemicalAnalysis of Thermal Insu-
tion Coefficients by the Reverberation Room Method
lationMaterialsforLeachableChloride,Fluoride,Silicate,
C367Test Methods for Strength Properties of Prefabricated
and Sodium Ions
E90Test Method for Laboratory Measurement of Airborne
1
This terminology is under the jurisdiction of ASTM Committee E33 on Sound Transmission Loss of Building Partitions and
Building and Environmental Acoustics and is the direct responsibility of Subcom-
Elements
mittee E33.07 on Definitions and Editorial.
E336Test Method for Measurement of Airborne Sound
Current edition approved Sept. 1, 2013. Published December 2013. Originally
Attenuation between Rooms in Buildings
approved in 1969. Last previous edition approved in 2011 as C634–11. DOI:
10.1520/C0634-13.
E413Classification for Rating Sound Insulation
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
E477Test Method for Laboratory Measurements of Acous-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ticalandAirflowPerformanceofDuctLinerMaterialsand
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Prefabricated Silencers
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C634 − 13
E492Test Method for Laboratory Measurement of Impact E1414Test Method for Airborne Sound Attenuation Be-
Sound Transmission Through Floor-Ceiling Assemblies tween Rooms Sharing a Common Ceiling Plenum
Using the Tapping Machine E1433Guide for Selection of Standards on Environmental
3
E497Practice for Installing Sound-Isolating Lightweigh
...
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: C634 − 11 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.
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, 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. The dimensions are
−1
[LT ], the negative exponent indicating division. The unit is 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 conversion factors
are listed in Section 4 of this terminology.
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
C522 Test Method for Airflow Resistance of Acoustical Materials
C634 Terminology Relating to Building and Environmental Acoustics
C635 Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in
Panel Ceilings
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
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 Dec. 1, 2011Sept. 1, 2013. Published January 2012December 2013. Originally approved in 1969. Last previous edition approved in 20102011
as C634 – 10a.C634 – 11. DOI: 10.1520/C0634-11.10.1520/C0634-13.
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 ----------------------
C634 − 13
C871 Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and
Sodium Ions
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
E413 Classification for Rating Sound Insulation
...
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