BS EN ISO 354-2003 Acoustics - Measurement of sound absorption in a reverberation room《声学 混响室内声音吸收的测量》.pdf

1、BRITISH STANDARD BS EN ISO 354:2003 Incorporating Corrigendum No. 1 Acoustics Measurement of sound absorption in a reverberation room The European Standard EN ISO 354:2003 has the status of a British Standard ICS 91.120.20 BS EN ISO 354:2003 This British Standard was published under the authority of

2、 the Standards Policy and Strategy Committee on 9 June 2003 BSI 23 October 2003 ISBN 0 580 41976 2 National foreword This British Standard is the official English language version of EN ISO 354:2003. It is identical with ISO 354:2003. It supersedes BS EN 20354:1993 which is withdrawn. The UK partici

3、pation in its preparation was entrusted by Technical Committee EH/1, Acoustics, to Subcommittee EH/1/6, Building acoustics, 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 wh

4、ich implement international 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 public

5、ation does not purport 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 internationa

6、l/European committee any 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 ISO titl

7、e page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 21, the Annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Da

8、te Comments 14766 Corrigendum No. 1 23 October 2003 Correction to EN ISO foreword and incorporating the Annex ZA pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO354 May2003 ICS91.120.20 SupersedesENISO354:1993 Englishversion AcousticsMeasurementofsoundabsorptioninareverberation room(ISO354:2

9、003) AcoustiqueMesuragedelabsorptionacoustiqueensalle rverbrante(ISO354:2003) AkustikMessungderSchallabsorptioninHallrumen (ISO354:2003) ThisEuropeanStandardwasapprovedbyCENon23April2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an

10、 Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemade

11、bytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Net

12、herlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnation

13、alMembers. Ref.No.ENISO354:2003ECORRECTED20030924 Foreword Thisdocument(ENISO354:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC43 “Acoustics“incollaborationwithTechnicalCommitteeCEN/TC126“Acousticpropertiesof buildingproductsandofbuildings“,thesecretariatofwhichisheldbyAFNOR. ThisEuropeanStandardsha

14、llbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyNovember2003,andconflictingnational standardsshallbewithdrawnatthelatestbyNovember2003. ThisdocumentsupersedesENISO354:1993. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorgani

15、zationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofIS

16、O354:2003hasbeenapprovedbyCENasENISO354:2003withoutany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO354:2003 Reference number ISO 354:2003(E)INTERNATIONAL STANDARD ISO 354 Second edition 2003-05-15 Acoustics Measurement of sound absorption in a re

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22、 dnaii ENISO354:2003ISO 354:2003(E) iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle . 3 5 Frequency range . 3 6 Test arrangement 3 6.1 Reverberation room and diffusion of sound field . 3 6.2 Test specimens . 4 6.3 Temperature an

23、d relative humidity . 5 7 Measurement of reverberation time 5 7.1 General. 5 7.2 Interrupted noise method. 6 7.3 Integrated impulse response method. 7 7.4 Evaluation of reverberation times based on decay curves 9 8 Expression of results 9 8.1 Method of calculation . 9 8.2 Precision 11 8.3 Presentati

24、on of results . 12 9 Test report . 13 Annex A (normative) Diffusivity of the sound field in the reverberation room 14 Annex B (normative) Test specimen mountings for sound absorption tests 15 Bibliography . 21 ENISO354:2003ISO 354:2003(E) iv Foreword ISO (the International Organization for Standardi

25、zation) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to b

26、e represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standa

27、rds are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter

28、national Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 354 was

29、 prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics. This second edition cancels and replaces the first edition (ISO 354:1985), which has been technically revised, as follows: an integrated impulse response method has been introduced; the requirement to measu

30、re at least 36 decays has been added; mounting conditions according to ISO 354:1985:Amd.1:1997 and mounting conditions Type B and Type J have been introduced. ENISO354:2003ISO 354:2003(E) vIntroduction When a sound source operates in an enclosed space, the level to which reverberant sound builds up,

31、 and the subsequent decay of reverberant sound when the source is stopped, are governed by the sound-absorbing characteristics of the boundary surfaces, the air filling the space, and objects within the space. In general, the fraction of the incident sound power absorbed at a surface depends upon th

32、e angle of incidence. In order to relate the reverberation time of an auditorium, office, workshop, etc., to the noise reduction that would be effected by an absorbing treatment, knowledge of the sound-absorbing characteristics of the surfaces, usually in the form of a suitable average over all angl

33、es of incidence, is required. Since the distribution of sound waves in typical enclosures includes a wide and largely unpredictable range of angles, a uniform distribution is taken as the basic condition for the purposes of standardization. If, in addition, the sound intensity is independent of the

34、location within the space, the sound distribution is called a diffuse sound field, and the sounds reaching a room surface are said to be at random incidence. The sound field in a properly designed reverberation room closely approximates a diffuse field. Hence, sound absorption measured in a reverber

35、ation room closely approximates the sound absorption that would be measured under the basic conditions assumed for standardization. The purpose of this International Standard is to promote uniformity in the methods and conditions of measurement of sound absorption in reverberation rooms. ENISO354:2003