ASTM_E_2249_-_02_2008.pdf

Designation:E224902(Reapproved 2008)Standard Test Method forLaboratory Measurement of Airborne Transmission Loss ofBuilding Partitions and Elements Using Sound Intensity1This standard is issued under the fixed designation E2249;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.INTRODUCTIONThis standard test method is part of a set for evaluating the sound transmission loss of a partitionor partition element under laboratory conditions.It differs from Test Method E90 in that the soundpower radiated by the element under test is measured directly using an intensity probe rather thanindirectly from the space averaged receiver room sound pressure and the room reverberation time.This test method is especially useful when the receiver room requirements of Test Method E90 can notbe achieved,or flanking sound involving the receiver room surfaces is present but its influence is tobe circumvented(1)2,as discussed in Annex A3.Others test methods to evaluate sound insulation of building elements include:Test Method E90,airborne transmission loss of an isolated partition element in a controlled laboratory environment,TestMethod E492,laboratory measurement of impact sound transmission through floors,Test MethodE336,measurement of sound isolation in buildings,Test Method E1007,measurement of impactsound transmission in buildings,Guide E966,measurement of sound transmission through buildingfacades and facade elements.1.Scope1.1 This test method covers the measurement of airbornesound transmission loss of building partitions such as walls ofall kinds,operable partitions,floor-ceiling assemblies,doors,windows,roofs,panels and other space-dividing buildingelements.It may also be have applications in sectors other thanthe building industry,although these are beyond the scope.1.2 The primary quantity reported by this standard is Inten-sity Transmission Loss(ITL)and shall not be given anothername.Similarly,the single-number rating Intensity SoundTransmission Class(ISTC)derived from the measured ITLshall not be given any other name.1.3 This test method may be used to reveal the soundradiation characteristics of a partition or portion thereof.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1The method for measuring the sound intensity radiated by thebuilding element under test defined by this ASTM standard meets orexceeds those of ISO 15186-1.Special consideration will have to be givento requirements for the source room and specimen mounting if compliancewith ISO 15186-1 is also desired as they differ from those of this standard.2.Referenced Documents2.1 ASTM Standards:3C634 Terminology Relating to Building and EnvironmentalAcousticsE90 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 test method is under the jurisdiction ofASTM Committee E33 on Buildingand Environmental Acoustics and is the direct responsibility of SubcommitteeE33.03 on Sound Transmission.Current edition approved Oct.1,2008.Published February 2009.Originallyapproved in 2002.Last previous edition approved in 2002 as E224902.DOI:10.1520/E2249-02R08.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3For 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 2.2 ANSI Standards:4S1.9 Instruments for the Measurement of Sound IntensityS1.11 Specification for Octave-Band and Fractional Octave-Band Analogue and Digital Filters2.3 ISO Standards:4ISO 140-3 AcousticsMeasurement of Sound Insulation inBuildings and of Building ElementsPart 3:LaboratoryMeasurements of Sound Insulation of Building ElementsISO 9614-1 AcousticsDetermination of Sound PowerLevels of Noise Sources Using Sound IntensityPart 1:Measurement at Discrete PointsISO 9614-2 AcousticsDetermination of Sound PowerLevels of Noise Sources Using Sound IntensityPart 2:Measurement by ScanningISO 15186-1 AcousticsMeasurement of Sound Insulationin Buildings and of Building Elements Using SoundIntensityPart 1