ASTM_E_1704_-_95_2010.pdf

Designation:E170495(Reapproved 2010)Standard Guide forSpecifying Acoustical Performance of Sound-IsolatingEnclosures1This standard is issued under the fixed designation E1704;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.1.Scope1.1 The guide covers the development of criteria for theacoustical performance of a broad variety of acoustical enclo-sures by identifying information necessary to unambiguouslydescribe acoustical performance.This guide is not a standardASTM specification for a sound-isolating enclosure.1.2 Excluded from the scope of this guide are technicalconsiderations for enclosure design that do not pertain directlyto acoustical performance.1.3 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.2.Referenced Documents2.1 ASTM Standards:2C423 Test Method for SoundAbsorption and SoundAbsorp-tion Coefficients by the Reverberation Room MethodC634 Terminology Relating to Building and EnvironmentalAcousticsE336 Test Method for Measurement of Airborne SoundAttenuation between Rooms in BuildingsE413 Classification for Rating Sound InsulationE596 Test Method for Laboratory Measurement of NoiseReduction of Sound-Isolating Enclosures2.2 ANSI Standards:ANSI S1.4 Specification for Sound Level Meters3ANSI S3.1 Maximum PermissibleAmbient Noise Levels forAudiometric Test Rooms3ANSI S3.6 Specification for Audiometers3ANSI S12.31S12.35 Methods for Determining the SoundPower Levels of Machines and Equipment32.3 ISO Standard:ISO 37413745 AcousticsMethods for Determining theSound Power Levels of Machines and Equipment42.4 Government Standard:29 CFR 1910.95 Occupational Noise Exposure Occupa-tional Safety and Health Administration52.5 Other Standard:VDI 2711 Schallschutz durch Kapeslung Verein DeutscherIngeireure,Beuth Verlag GmbH,Berlin German NoiseControl by the Use of Enclosures63.Terminology3.1 Definitions:3.1.1 Standard definitions of acoustical terms may be foundin Terminology C634.3.2 Definitions of Terms Specific to This Standard:3.2.1 A-weighted sound pressure levelsound pressurelevel measurements made with the A-weighting filter appliedas defined in ANSI S1.4,denoted LPAin this guide.3.2.2 C-weighted sound pressure levelsound pressurelevel measurements made with the C-weighting filter appliedas defined in ANSI S1.4,denoted LPCin this guide.3.2.3 enclosurea structure,usually free-standing,whichsubstantially or completely encloses a given space or object.This does not include barrier walls,partitions within a building,or other partial structures.3.2.4 enclosure-generated noisesound created by the op-eration of the enclosure systems,such as lighting and ventila-tion.3.2.5 level reductionfor the purposes of this guide,thearithmetic difference between sound pressure levels at aspecific location before and after the installation of theenclosure,expressed in decibels.1This guide is under the jurisdiction of ASTM Committee E33 on Building andEnvironmentalAcoustics and is the direct responsibility of Subcommittee E33.03 onSound Transmission.Current edition approved May 1,2010.Published August 2010.DOI:10.1520/E1704-95R10.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.5Available from the Superintendent of Documents,U.S.Government PrintingOffice,Washington,DC 20402.6Available from Beuth Verlag GmbH,Burggrafenstrasse 4-7,1000 Berlin 30.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.6 level reduction specificationspecification of theacoustical performance of an enclosure by stating the reductionin sound pressure level caused by the enclosure.3.2.7 personnel enclosurean enclosure designed to keepsound energy from personnel or equipment therein.Examplesof personnel enclosures include but are not limited to audio-metric booths,in-plant offices,broadcast booths,and acousticaltest chambers.3.2.8 pre-installation sound pressure levelsthe soundpressure levels,as a function of frequency,that are presentprior to the installation of the enclosure.In most cases this isdetermined by measuring the ambient sound pressure levels inthe host area but in s