ASTM_C_634_-_13e1.pdf

Designation:C634131Standard Terminology Relating toBuilding and Environmental Acoustics1This standard is issued under the fixed designation C634;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorial corrections made throughout in October 2016.INTRODUCTIONIn some of the entries,those that are measures of physical quantities,the term is followed by severalitems:an abbreviation or a symbol,or both,the dimensions of quantities,the measurement units,andthe part of speech.The abbreviation,where applicable,indicates the term as typically referenced.Thesymbol stands for the magnitude of the quantity in mathematical expressions.The dimensions of aquantity express its measure in terms of three fundamental quantities:M for mass,L for length,andT for time.Speed,for instance,is the quotient obtained when the distance an object moves is dividedby the time involved.The dimensions are LT1,the negative exponent indicating division.Themeasurement units are consistently in SI,Le Systme International dUnits.Those still using the cgs(centimetre-gram-second)or the inchpound system of units are referred for most of the conversionfactors to IEEE/ASTM SI 10.Some conversion factors are listed in Section 5 of this document forconvenient reference.The dimensions of a quantity are the same regardless of the units in which the quantity is measured.Speed has the dimensions LT1 whether it is measured in miles per hour,feet per second,or metresper second.Quantities with different dimensions are not the same.Flow resistance and specific flowresistance,for instance,are quantities of different kinds even though the names are similar.On theother hand,quantities with the same dimensions are not necessarily of the same kind.Sound energydensity,for instance,has the same dimensions as sound pressure,ML1T2,but it is not a kind ofsound pressure.Nor is absorption with the dimensions L2 a kind of area.1.Scope1.1 This terminology covers terms and definitions related toenvironmental acoustics.Only definitions common to two ormore standards under the jurisdiction of Committee E33 arelisted here.The purpose of this terminology is to promoteuniformity of key definitions.Definitions pertinent to only onestandard and exceptions to the definitions listed below arecontained in the individual standards and should be used whenfollowing those standards.2.Referenced Documents2.1 ASTM Standards:2C367 Test Methods for Strength Properties of PrefabricatedArchitectural Acoustical Tile or Lay-In Ceiling PanelsC384 Test Method for Impedance and Absorption of Acous-tical Materials by Impedance Tube MethodC423 Test Method for SoundAbsorption and SoundAbsorp-tion Coefficients by the Reverberation Room MethodC522 Test Method for Airflow Resistance of AcousticalMaterialsC635 Specification for the Manufacture,Performance,andTesting of Metal Suspension Systems for Acoustical Tileand Lay-in Panel CeilingsC636 Practice for Installation of Metal Ceiling SuspensionSystems for Acoustical Tile and Lay-In PanelsE90 Test Method for Laboratory Measurement of AirborneSound Transmission Loss of Building Partitions andElementsE336 Test Method for Measurement of Airborne SoundAttenuation between Rooms in BuildingsE413 Classification for Rating Sound Insulation1This terminology is under the jurisdiction of ASTM Committee E33 onBuilding and Environmental Acoustics and is the direct responsibility of Subcom-mittee E33.07 on Definitions and Editorial.Current edition approved Sept.1,2013.Published December 2013.Originallyapproved in 1969.Last previous edition approved in 2011 as C634 11.DOI:10.1520/C0634-13E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 E477 Test Method for Laboratory Measurements of Acous-tical andAirflow Performance of Duct Liner Materials andPrefabricated SilencersE492 Test Method for Laboratory Measurement of ImpactSound Transmission Through Floor-Ceiling AssembliesUsing the Tapping MachineE557 Guide for Architectural Design and Installation Prac-tices for Sound Isolation between Spaces Separated byOperable PartitionsE596 Test Method for Laboratory Measurement of NoiseReduction of Sound-Isolating EnclosuresE756 Test Method for Measuring Vibration-Damping Prop-erties of MaterialsE795 Practices for Mounting Test Specimens During SoundAbsorption TestsE966 Guide for Field Measurements of Airborne SoundAttenuation of Building Facades and Facade ElementsE989 Classification for Determination of Impact InsulationClass(IIC)E1007 Test Metho