1、BRITISH STANDARD BS EN 12354-6:2003 Building Acoustics Estimation of acoustic performance of buildings from the performance of elements Part 6: Sound absorption in enclosed spaces The European Standard EN 12354-6:2003 has the status of a British Standard ICS 91.120.20 BS EN 12354-6:2003 This British
2、 Standard was published under the authority of the Standards Policy and Strategy Committee on 15 January 2004 BSI 15 January 2004 ISBN 0 580 43268 8 National foreword This British Standard is the official English language version of EN 12354-6:2003. The UK participation in its preparation was entrus
3、ted by Technical Committee B/209, General building codes, to Subcommittee B/209/18, Sound insulation, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement internat
4、ional or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport
5、 to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee a
6、ny enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 25 and
7、a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN123546 December2003 ICS91.120.20 Englishversion BuildingAcousticsEstimationofacous
8、ticperformanceof buildingsfromtheperformanceofelementsPart6:Sound absorptioninenclosedspaces AcoustiquedubtimentCalculdelaperformance acoustiquedesbtimentspartirdelaperformancedes lmentsPartie6:Absorptionacoustiquedespiceset espacesferms BauakustikBerechnungderakustischenEigenschaften vonGebudenausd
9、enBauteileigenschaftenTeil6: SchallabsorptioninRumen ThisEuropeanStandardwasapprovedbyCENon13November2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliog
10、raphicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtot
11、heManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUR
12、OPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN123546:2003EEN123546:2003(E) 2 Contents Page Foreword3 1 Scop
13、e 4 2 Normativereferences 4 3 Relevantquantities . .4 3.1 Buildingperformance 4 3.2 Elementperformance . .5 3.3 Othertermsandquantities .5 4 Calculationmodels 6 4.1 Generalprinciples 6 4.2 Inputdata 6 4.3 Determinationofthetotalequivalentabsorptionarea . .7 4.4 Determinationofreverberationtime. .8 4
14、.5 Interpretations9 4.6 Limitations9 5 Accuracy.10 AnnexA (normative) Listofsymbols 11 AnnexB (informative) Soundabsorptionofmaterials 14 B.1 Examples 14 B.2 Calculation14 AnnexC (informative) Soundabsorptionofobjects .17 AnnexD (informative) Estimationforirregularspacesand/orabsorptiondistribution
15、18 D.1 Introduction 18 D.2 Irregularabsorptiondistribution. .18 D.3 Irregularlyshapedspaces. 22 AnnexE (informative) C alculationexample 24 Bibliography 25EN123546:2003(E) 3 Foreword Thisdocument(EN123546:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC126“Acoustic propertiesof buildingpr oductsa ndof
16、 buildings”,the secretariatof whichis held byAFN OR. ThisEuropeanStandardshall begiventhestatusof anationalstandard,eitherbypublicationofanidentical textor byendorsement,att helatestbyJune2004,andconflictingnationalstandardsshallbewithdrawnat thelatest by June20 04. Thisdocumentisthefirstversionofas
17、tandardwhichformsapartofaseriesofstandardsspecifying calculation modelsinb uilding acoustics: Part1:Airbornesoundinsulationbetweenrooms Part2:Impactsoundinsulationbetweenrooms Part3:Airbornesoundinsulationagainstoutdoorsound Part4:Transmissionofindoorsoundtotheoutside Part5:Soundlevelsduetoserviceeq
18、uipment Part6:Soundabsorptioninenclosedspaces Althoughthispartcoversthemostcommontypesofenclosedspacesinbuildingsitcannotyetcoverall variationsofsuchspaces.Itsetsoutanapproachforgainingexperienceforfutureimprovementsand developmentsofthesta ndard. The accuracyof thissta ndardc annotbespeci fiedinde
19、tail until wideran gingco mparisons with field data have been made,which can,i n turn,on lyb e gatheredover a periodof useof thepre diction model. To help the user in the meantime, indicationsof the accuracyh avebe en given, basedon earlierco mparablepr ediction models. Itist heresp onsibilityof the
20、 user(i. e. a person, an organisation,the authorities) toconsider the consequences oftheaccuracy,inherentin allmeasurementandpredictionmethods,tos pecifyrequirementsforinputdata and/ora pplyasa fety margint o the resultsor to applyso meothercorrec tion. Annex A isnor mative,a nnexes B,C , Da nd Ear
21、e informative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands, Norway,Portu g
22、al,Sl ovakia,Sp ain, Sweden,Swi tzerland andt heU nited Kingdom.EN123546:2003(E) 4 1Scope ThisEuropeanStandarddescribesacalculationmodeltoestimatethetotalequivalentsoundabsorptionarea orreverberationtimeofenclosedspacesinbuildings.Thecalculationisprimarilybasedonmeasureddata thatcharacterisethesound
23、absorptionofmaterialsandobjects.Calculationscanonlybecarriedoutfor frequencybands. ThisEuropeanStandarddescribestheprinciplesofthecalculationmodel,liststherelevantquantitiesand definesitsapplicationsandrestrictions.Itisintendedforacousticalexpertsandprovidestheframeworkfor thedevelopmentofapplicatio
24、ndocumentsandtoolsforotherusersinthefieldofbuildingconstruction,taking intoaccountlocalcircumstances. Themodelisbasedonexperiencewithpredictionsforrooms,suchasroomsindwellingsandoffices,and commonspacesinbuildings,suchasstairwells,corridorsandroomscontainingmachineryandtechnical equipment.Itisnotint
25、endedtobeusedforverylargeorirregularlyshapedspaces,suchasconcerthalls, theatresandfactories. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted her
26、eafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies(includingamendments). ENISO354, AcousticsMeasurementofsoundabsorptionina
27、reverberationroom(ISO354:2003). ISO96131,AcousticsAttenuationofsoundduringpropagationoutdoorsPart1:Calculationofthe absorptionofsoundbytheatmosphere. 3 Relevantquantities 3.1 Buildingperformance 3.1.1 quantitiestoexpressbuildingperformance soundabsorptioninenclosedspacescanbeexpressedintermsoftheequ
28、ivalentabsorptionareaorthe reverberationtimeinaccordancewithprENISO33822.Thesequantitiesaredeterminedinfrequencybands (onethirdoctavebandsoroctavebands) 3.1.2 equivalentsoundabsorptionareaofaroom A hypotheticalareaofatotallyabsorbingsurfacewithoutdiffractioneffectswhich,ifitweretheonlyabsorbing elem
29、entintheroom,wouldgivethesamereverberationtimeastheroomunderconsideration NOTE Equivalentsoundabsorptionareaofaroomisexpressedinm 2 . 3.1.3 reverberationtime T timerequiredforthesoundpressureleveltodecreaseby60dBafterthesoundsourcehasstopped NOTE1 Reverberationtimeisexpressedins. NOTE2 Thedefinition
30、of Twithadecreaseby60dBofthesoundpressurelevelmaybefulfilledbylinearextrapolation ofashorterevaluationrange.EN123546:2003(E) 5 NOTE3 Whereadecaycurveisnotmonotonicthereverberationtimeisdefinedbythetimesatwhichthedecaycurve firstreaches5dBand25dBbelowtheinitiallevel,respectively.Inthecaseofuncertaint
31、ythisreverberationtimeshould belabelled T 20 . 3.2Element performance 3.2.1 quantitiestoexpresselementperformance soundabsorptionofelementsinaccordancewithENISO354canbeexpressedastheequivalentsound absorptionareaorthesoundabsorptioncoefficient.Thesequantitiesaredeterminedinonethirdoctave bandsandcan
32、alsobeexpressedinoctavebands NOTE Alsoasinglenumberratingfortheelementperformancecanbeobtainedfromthefrequencybanddatain accordancewithENISO116547,forinstancea w (M).Suchsinglenumberratingsmaybeusedforcomparingor specifyingtherequiredperformanceofproducts,buttheycannotbeuseddirectlytocalculatetheper
33、formanceinsitu. 3.2.2 equivalentsoundabsorptionareaofanobject A obj differencebetweentheequivalentsoundabsorptionareawithandwithouttheobject(testspecimen)inthe testroom NOTE Equivalentsoundabsorptionareaofanobjectisexpressedinm 2 . 3.2.3 soundabsorptioncoefficient aa s equivalentsoundabsorptionareao
34、fatestspecimendividedbytheareaofthetestspecimen NOTE1 Forplaneabsorberswithbothsidesexposed,thisrelatestoeachsideasanaveragevalueoverbothsides. NOTE2 Thisquantityappliesonlytoaflatabsorberoraspecifiedarrayofobjects,andnottosingleobjects. 3.2.4 otherrelevantdata forcalculationsadditionalinformationma
35、ybenecessary,e.g.: areaoftheroomboundaryelements; volumeandshapeoftheenclosedspace; amountandnatureofobjectsandfittingsintheenclosedspace; numberofpeopleassumedtobepresentintheroom 3.3 Othertermsandquantities 3.3.1 absorptionbyair A air equivalentabsorptionareaofthesoundattenuationbyair 3.3.2 emptyr
36、oomvolume V volumeoftheenclosedspacewithouttheobjectsandfittingspresentEN123546:2003(E) 6 3.3.3 objectvolume V obj volumeofthesmallestregularshapedenvelopeforanobject,ignoringsmallelementsthatprotrudethrough thatenvelope NOTE Anexampleofsmallprotrudingelementswhichcanbeignored,arethelegsofatable. 3.
37、3.4 objectfraction Y ratioofthesumofthevolumesofallobjectstothevolumeoftheemptyspace 3.3.5 objectarray specificarrayofobjectsforwhichtheabsorptionisexpressedbyasoundabsorptioncoefficient a s relatedtothesurfaceareacoveredbythearray. 4 Calculationmodels 4.1 Generalprinciples Forthecalculationoftheequ
38、ivalentsoundabsorptionareaandreverberationtimeinenclosedspacesitis assumedthatthesoundfieldisdiffused.Thismeansthatthedimensionsoftheenclosedspacearesimilar (see4.6)andtheabsorptionisdistributedoverthespace;thepresenceofsoundscatteringobjectsrelaxes theserestrictions.Theeffectofabsorptionbysurfaces,
39、byobjectsincludingpersons,byobjectarraysand byairistakenintoaccount. NOTE1 Forothersituations,suchasirregularlyshapedspacesandirregularabsorptiondistribution,guidancefor improvedcalculationmodelsisgiveninannexD.Inirregularlyshapedspaces,suchasstairwellsorroomsfilledwith machinery,itisassumedthatthes
40、oundpressurelevelandhenceabsorptionbettercharacterisestheperformancethan reverberationtime. Themodelcanbeusedtocalculatethebuildingperformanceinfrequencybands,basedonacousticdatafor theelementsinfrequencybands.Thecalculationisnormallyperformedinoctavebandsinthefrequency rangefrom125Hzto4000Hz. NOTE
41、2 Thecalculationscanbeextendedtohigherorlowerfrequencies.However,particularlyforthelower frequenciesnoinformationisavailableatpresentontheaccuracyofcalculationsfortheseextendedfrequencyregions. AlistofsymbolsusedinthemodelsisgiveninannexA. 4.2Input data Theequivalentabsorptionareaandthereverberation
42、timecanbedeterminedfrom: absorptioncoefficientofsurface i: a s,i; areaofsurface i: S i; equivalentabsorptionareaofobject j : A obj,j; absorptioncoefficientofobjectarray k: a s,k; areaofsurfacecoveredbytheobjectarray k: S k; volumeofemptyenclosedspace: V;EN123546:2003(E) 7 volumeofobjectjorobjectarra
43、y k: V obj,j , V obj,k. Theacousticdataonthematerials,objectsandobjectconfigurationsinvolvedshouldbetakenprimarilyfrom standardizedlaboratorymeasurementsinaccordancewithENISO354.However,theymayalsobededuced inotherways,usingtheoreticalcalculations,empiricalestimationsorfieldmeasurementresults.Datasources usedshallbeclearlystated. Theinputdataforcalculationsinoctavebandscanbetakenasthearithmeticmeanvalueofthe correspondingonethirdoctavebandvalues. NOTE Usingthearithmeticmean
