BS EN ISO 5135-1999 Acoustics - Determination of sound power levels of noise from air-terminal devices air-terminal units dampers and valves by measurement in a reverberation room《.pdf

1、BRITISH STANDARD BS EN ISO 5135:1999 Acoustics Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room The European Standard EN ISO5135:1998 has the status of a BritishStandard ICS17.140.20; 91.140.30BSENIS

2、O5135:1999 This British Standard, having been prepared under the directionof the Health and Environment Sector Committee, was published under the authorityof the Standards Committee and comes intoeffecton 15 March1999 BSI05-1999 ISBN 0 580 30759 X National foreword This British Standard is the Engli

3、sh language version of EN ISO5135:1998. It is identical with ISO5135:1997. It supersedes BS4773-2:1989 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee EH/1, Acoustics, to Subcommittee EH/1/4, Machinery noise, which has the responsibility to: aid enqui

4、rers to understand the text; present to the responsible international/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. A list of organizations re

5、presented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The Brit

6、ish Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not pur

7、port to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front

8、cover, pages i and ii, theEN ISO title page, page2, the ISO title page, page ii, pages1 to12, aninside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. A

9、mendments issued since publication Amd. No. Date CommentsBSENISO5135:1999 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword 2 Foreword ii Text of ISO 5135 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO5135 December1998 ICS17.140.20 Supersedes EN25135:1991 D

10、escriptors: See ISO document English version Acoustics Determination of sound power levelsofnoisefromair-terminal devices, air-terminal units, dampers and valves by measurementinareverberation room (ISO5135:1997) Acoustique Dtermination des niveaux de puissance acoustique du bruit mis par les bouche

11、s dair, les units terminales, les registres et clapets au moyen de mesurages en salle rverbrante (ISO5135:1997) Akustik Bestimmung des Schalleistungspegels von Geruschen von Luftdurchlssen, Volumenstromreglern, Drossel- und Absperrelementen durch Messungen im Hallraum (ISO5135:1997) This European St

12、andard was approved by CEN on4 December1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning

13、 such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own langu

14、age and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Sw

15、itzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.

16、 Ref. No. EN ISO5135:1998 EENISO5135:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC43 “Acoustics” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC211 “Acoustics”,

17、the secretariat of which is held by DS This European Standard replaces EN25135:1991. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June1999, and conflicting national standards shall be withdrawn

18、 at the latest by June1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembour

19、g, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO5135:1997 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed inAnnex

20、 ZA (normative). Contents Page Foreword 2 Introduction 1 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Acoustic test facilities and procedures 1 5 Installation and operation of equipmenttobetested 2 6 Auxiliary facilities 3 7 Measurements and calculations 3 8 Test report 4 Annex A (informativ

21、e) Bibliography Inside back cover Annex ZA (normative) Normativereferencesto internationalpublicationswith their relevantEuropean publications Inside back cover Figure 1 Location of equipment in test room 5 Figure 2 Mounting detail for air-terminal device installed on or against a surface 6 Figure 3

22、 Mounting detail for equipmentinstalledat intersection of two surfaces 7 Figure 4 Mounting detail for air-terminal device installed away from surface 8 Figure 5 Mounting detail for air-terminal units installed outside room boundary 9 Figure 6 Mounting detail for air-terminal unit to determine casing

23、 radiated sound 10 Figure 7 a) Examples of L W and L WAplottedagainst lg(q V ) for a test with constanttotalpressure loss coefficient 11 Figure 7 b) Examples of L Wand L WAplottedagainstlg(%p t ) for a test with constant flow rate 12 Table 1 Values of 7 for the configurationsillustrated inFigure 1 4

24、ENISO5135:1998 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) 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 interes

25、ted in a subject for which a technical committee has been established has the right to be 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 C

26、ommission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. Interna

27、tional Standard ISO5135 was prepared by ISO/TC43, Acoustics, Subcommittee SC1, Noise. This second edition cancels and replaces the first edition (ISO5135:1984), of which it constitutes a technical revision. Annex A of this International Standard is for information only. Descriptors: Acoustics, air t

28、erminal devices, pressure equipment, dampers, valves, noise (sound), engine noise, tests, acoustic tests, determination, sound power, acoustic measurements.ENISO5135:1998 BSI 05-1999 1 Introduction This International Standard defines requirements for acoustic testing in reverberation rooms of the ty

29、pe of equipment listed in clause1. It is based on the use of ISO3741, which describes the acoustic test facilities, instrumentation and procedures to be used for precision grade determination of sound power levels in octave or one-third-octave bands of a noise source. 1 Scope This International Stan

30、dard establishes general rules for the acoustic testing of air-terminal units, dampers and valves used in air diffusion and air distribution systems as defined in ISO3258 in order to determine sound power levels as defined in ISO3740. 2 Normative references The following standards contain provisions

31、 which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibi

32、lity of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO3258:1976, Air distribution and air diffusion Vocabulary. ISO3740:1980, Acoustics Determination of sound power levels of noise sources

33、Guidelines for the use of basic standards and for the preparation of noise test codes. ISO3741:, Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for reverberation rooms 1) . ISO5219:1984, Air distribution and air diffusion Laboratory aerodynamic

34、testing and rating of air terminal devices. ISO5220:1981, Air distribution and air diffusion Aerodynamic testing and rating of constant and variable dual or single duct boxes and single duct units. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 so

35、und pressure level L p ten times the logarithm to the base10 of the ratio of the mean-square sound pressure of a sound to the square of the reference sound pressure, in decibels NOTEThe reference sound pressure is20 4Pa. 3.2 sound power level L W ten times the logarithm to the base10 of the ratio of

36、 a given sound power to the reference sound power, in decibels NOTEThe reference sound power is1pW ( =10 12 W). 3.3 frequency range of interest the range which includes the octave bands with midband frequencies between63Hz and8000Hz or the one-third-octave bands with midband frequencies between50Hz

37、and10000Hz NOTEMany rooms will not be qualified for measurements below the one-third-octave band centred at100Hz and the octave band centred at125Hz, respectively. In these cases the result may still be reported provided that all deviations are clearly indicated in the test report. 3.4 reverberant s

38、ound field that portion of the sound field in the test room over which the influence of sound received directly from the source is negligible 4 Acoustic test facilities and procedures This International Standard is applicable to equipment operating under steady state conditions and with a volume les

39、s than2% of the volume of the reverberation room. The acoustic test facilities, instrumentation and procedures to be used, including room qualification tests, are described in ISO3741. This document offers a choice of two methods for reverberation room measurements for determining sound power levels

40、. The comparison method uses a reference sound source having a known sound power output. The direct method requires knowledge of the reverberation time of the room in which the determination is made. 1) To be published. (Revision of ISO3741:1988 and ISO3742:1988)ENISO5135:1998 2 BSI 05-1999 If there

41、 are substantial variations in the reverberant room characteristics due to the presence of the source to be tested, then the test room shall also be qualified according to ISO3741 with all equipment present in the room. 5 Installation and operation of equipment to be tested 5.1 General 5.1.1 When th

42、e equipment is mounted closer than1m to one or more reflecting planes the sound power level may depend strongly on the position of the equipment relative to these planes. Therefore, install the equipment to be tested in a position representative of normal usage.Figure 1 illustrates the overall test

43、environment, with the specific details of each type shown inFigure 2 toFigure 6. NOTEReflecting planes may, for practical reasons, be simulated by panels with an area-related mass greater than7kg/m 2 . Such panels should extend at least1,2m in all directions measured from any edge of the device unde

44、r test. These panels should be vibration isolated from the equipment under test. 5.1.2 Supply air to the equipment under test or exhaust air from it through a test installation in accordance with ISO5219 or ISO5220. 5.1.3 Include air-flow control accessories (dampers,deflectors, straighteners, equal

45、izers, etc.) normally used in conjunction with the equipment under test in the test set-up. Locate and set them in the same manner as recommended for the application of the equipment. 5.2 Test installation of air-terminal units, dampers and valves for measurement of the sound radiated to the reverbe

46、ration room 5.2.1 Position air-terminal devices normally installed in a boundary surface no closer than1m to the intersection of any adjacent surface and away from any position of boundary surface symmetry, as shown inFigure 2. 5.2.2 Mount air-terminal devices normally used at the intersection of tw

47、o surfaces at the intersection of the two surfaces not closer than1m to a third surface as shown inFigure 3. 5.2.3 Install air-terminal devices not normally positioned at any boundary surface within the test room no closer than1m to any surface and away from any position of room symmetry. Examples a

48、re shown inFigure 4. Diffusers installed on ducts without adjacent ceiling are typical examples. 5.2.4 The installation details specified in5.2.1 to5.2.3 apply equally to air-terminal devices when integral with air-terminal units. In this case measure a combined total of radiated sounds. 5.3 Test in

49、stallation of air-terminal units, dampers and valves for the measurement of the sound radiated to the reverberation room by the connecting duct To measure equipment normally located above the ceiling or in another space adjacent to the room they serve, install the equipment outside the test room and connect it to the test room by an unlined duct1,5m long of the same cross-sectional shape and area as the equipment connection in the room (seeFigure 5). Terminate the duct flush with all surfaces of the test room no closer