DIN EN ISO 5136-2009 Acoustics - Determination of sound power radiated into a duct by fans and other air-moving devices - In-duct method (ISO 5136 2003) English version of DIN EN I.pdf

1、November 2009DEUTSCHE NORM English price group 26No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.140.20; 23.120!$Zc

2、“1556404www.din.deDDIN EN ISO 5136Acoustics Determination of sound power radiated into a duct by fans and otherair-moving devices In-duct method (ISO 5136:2003)English version of DIN EN ISO 5136:2009-11Akustik Bestimmung der von Ventilatoren und anderen Strmungsmaschinen in Kanleabgestrahlten Schall

3、leistung Kanalverfahren (ISO 5136:2003)Englische Fassung DIN EN ISO 5136:2009-11SupersedesDIN EN ISO 5136:2003-10www.beuth.deDocument comprises 79 pagesDIN EN ISO 5136:2009-11 2 National foreword This standard has been prepared by Technical Committee ISO/TC 43 “Acoustics”, Subcommittee SC 1 “Noise”

4、(Secretariat: DS, Denmark), Working Group WG 47 “Acoustics Determination of sound power radiated into a duct by fans and other air-moving devices In-duct method” in collaboration with Technical Committee CEN/TC 211 “Acoustics” (Secretariat: DS, Denmark). The responsible German body involved in its p

5、reparation was the Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, Noise Control and Vibration Engineering Standards Committee in DIN and VDI), Technical Committee NA 001-02-02 AA Schallschutzeinrichtungen (Schall-dmpfer, Kapseln, elastische Lagerung), Working

6、 Group NA 001-02-02-01 AK Schallschutz in Strmungs-kanlen. Amendment of the European Machinery Directive has made it necessary to review Annex Z in terms of the essential requirements of EU Directive 98/37/EC and the revised Directive, 2006/42/EC. The technical substance of the standard has not been

7、 changed. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 266 DIN EN ISO 266 ISO 7574-1 DIN EN 27574-1 ISO 3740 DIN EN ISO 3740 ISO 7574-3 DIN EN 27574-3 ISO 3741 DIN EN ISO 3741 ISO 7574-4 DIN EN 27574-4 ISO 3743-1 DIN EN ISO 3743-1 IS

8、O 9614-1 DIN EN ISO 9614-1 ISO 3743-2 DIN EN ISO 3743-2 ISO 9614-2 DIN EN ISO 9614-2 ISO 3744 DIN EN ISO 3744 ISO 9614-3 DIN EN ISO 9614-3 ISO 3745 DIN EN ISO 3745 IEC 60651 DIN EN 61672 (all parts) ISO 3746 DIN EN ISO 3746 IEC 60942 DIN EN 60942 ISO 5801 DIN 24163 (all parts) IEC 61260 DIN EN 61260

9、 ISO 7235 DIN EN ISO 7235 The national standards are given in Annex NA “Bibliography”. Amendments This standard differs from DIN EN ISO 5136:2003-10 as follows: a) Annexes ZA and ZB have been supplemented to show the relationship between this standard and the Machinery Directive 98/37/EC and the new

10、 revised Machinery Directive 2006/42/EC. b) The standard has been brought in line with ISO 5136:2003, subclause 5.2.6; the equation for the circular fan outlet has been corrected. Previous editions DIN 45635-9: 1989-12 DIN EN 25136: 1994-02 DIN EN ISO 5136: 2003-10 DIN EN ISO 5136:2009-11 3 National

11、 Annex NA (informative) Bibliography DIN 24163-1, Fans Performance testing Standard characteristics DIN 24163-2, Fans Performance testing Standardized test airways DIN 24163-3, Fans Performance testing of small fans using standardized test airways DIN EN 27574-1, Acoustics Statistical methods for de

12、termining and verifying stated noise emission values of machinery and equipment Part 1: General considerations and definitions DIN EN 27574-3, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 3: Simple (transition) method for st

13、ated values for batches of machines DIN EN 27574-4, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 4: Methods for stated values for batches of machines DIN EN 60942, Electroacoustics Sound calibrators DIN EN 61260, Electroacou

14、stics Octave-band and fractional-octave-band filters DIN EN 61672-1, Electroacoustics Sound level meters Part 1: Specifications DIN EN 61672-2, Electroacoustics Sound level meters Part 2: Pattern evaluation tests DIN EN 61672-3, Electroacoustics Sound level meters Part 3: Periodic tests DIN ISO 226,

15、 Acoustics Normal equal-loudness-level contours DIN EN ISO 3740, Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards DIN EN ISO 3741, Acoustics Determination of sound power levels of noise sources using sound pres-sure Precision methods for reverb

16、eration rooms DIN EN ISO 3743-1, Acoustics Determination of sound power levels of noise sources Engineering methods for small, movable sources in reverberant fields Part 1: Comparison method for hard-walled test rooms DIN EN ISO 3743-2, Acoustics Determination of sound power levels of noise sources

17、using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Methods for special reverberation test rooms DIN EN ISO 3744, Acoustics Determination of sound power levels of noise sources using sound pres-sure Engineering method in an essential free field over a re

18、flecting plane DIN EN ISO 3745, Acoustics Determination of sound power levels of noise sources using sound pres-sure Precision methods for anechoic and hemi-anechoic rooms DIN EN ISO 3746, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Sur

19、vey method using an enveloping measurement surface over a reflecting plane DIN EN ISO 5136:2009-11 4 DIN EN ISO 7235, Acoustics Laboratory measurement procedures for ducted silencers and air-terminal units Insertion loss, flow noise and total pressure loss DIN EN ISO 9614-1, Acoustics Determination

20、of sound power levels of noise sources using sound intensity Part 1: Measurement at discrete points DIN EN ISO 9614-2, Acoustics Determination of sound power levels of noise sources using sound intensity Part 2: Measurement by scanning DIN EN ISO 9614-3, Acoustics Determination of sound power levels

21、 of noise sources using sound intensity Part 3: Precision method for measurement by scanning EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 5136 August 2009 ICS 17.140.20; 23.120 Supersedes EN ISO 5136:2003English Version Acoustics - Determination of sound power radiated into a duct by fan

22、s and other air-moving devices - In-duct method (ISO 5136:2003) Acoustique - Dtermination de la puissance acoustique rayonne dans un conduit par des ventilateurs et dautres systmes de ventilation - Mthode en conduit (ISO 5136:2003) Akustik - Bestimmung der von Ventilatoren und anderen Strmungsmaschi

23、nen in Kanle abgestrahlten Schallleistung - Kanalverfahren (ISO 5136:2003) This European Standard was approved by CEN on 20 July 2009. 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 s

24、tandard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any ot

25、her language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estoni

26、a, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPIS

27、CHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 5136:2009: EContents Page Foreword .4 Introduction.5 1 Scope6 1.1 General .6 1.2 Types of sound s

28、ource .6 2 Normative references7 3 Terms, definitions and symbols 7 4 Uncertainty of the measurement method .12 5 Test facilities and instrumentation13 5.1 General requirements .13 5.2 Duct specifications14 5.3 Instrumentation .21 5.4 System calibration.24 6 Test arrangement 25 6.1 Sampling tube mou

29、nting 25 6.2 Microphone position .25 6.3 Operating condition control equipment26 7 Test procedure.26 7.1 Operating conditions 26 7.2 Sound pressure level readings 26 7.3 Measurements with and without flow straightener on the outlet side.27 7.4 Inlet side measurements Large fans: installation categor

30、y D (according to ISO 5801:1997).27 8 Calculations .28 8.1 Average sound pressure level .28 8.2 Sound power level.28 9 Information to be recorded.29 10 Information to be reported29 Annex A (normative) Determination of the combined mean flow velocity and modal correction C3,430 Annex B (normative) De

31、termination of the signal-to-noise ratio of sound vs. turbulent pressure fluctuation in the test duct36 Annex C (normative) Computational procedures for calculating the A-weighted sound power level from one-third-octave-band sound power levels.39 Annex D (informative) Example of calculation of C3,4f

32、or a given duct diameter and mean flow velocity .40 Annex E (informative) Guidelines for the design and construction of an anechoic termination .43 Annex F (informative) Evaluation of performance of anechoic terminations.52 Annex G (informative) Sampling tube information55 Annex H (informative) Test

33、 method for small ducted fans.59 Annex I (informative) Test method for large ducted fans .63 Annex J (informative) Measurement of the swirl component.70 Bibliography71 2 DIN EN ISO 5136:2009-11 EN ISO 5136:2009 (E) Annex ZA (informative) Relationship between this European Standard and the Essential

34、Requirements of EU Directive 98/37/EC .74 Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC . 75 3 EN ISO 5136:2009 (E) DIN EN ISO 5136:2009-11 Foreword 4 DIN EN ISO 5136:2009-11 EN ISO 5136:2009 (E) The text of ISO 5136:2003

35、 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 5136:2009 by Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS. This European Standard shall be given the stat

36、us of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2010, and conflicting national standards shall be withdrawn at the latest by February 2010. Attention is drawn to the possibility that some of the elements of this document may be the s

37、ubject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 5136:2003. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and sup

38、ports essential requirements of EC Directives. For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement

39、this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and t

40、he United Kingdom. Endorsement notice The text of ISO 5136:2003 has been approved by CEN as a EN ISO 5136:2009 without any modification. Introduction This International Standard describes a procedure for the measurement of sound pressure levels in the inlet or outlet ducts of a fan and a method to u

41、se these sound pressure levels to calculate the sound power levels radiated by the fan to the duct system. Annex A lists values of coefficients for the determination of the combined mean flow velocity and modal correction. Annex B specifies two procedures for the determination of the signal-to-noise

42、 ratio of sound versus turbulence. A computational procedure for the calculation of the A-weighted sound power level from one-third-octave band levels is given in Annex C. Annex D shows an example of the calculation of the combined mean flow velocity and modal correction. The sound power radiated in

43、to a duct by a fan or other air-moving device depends to some extent on the type of duct, characterized by its acoustical impedance. For a measurement method, the test duct has, therefore, to be clearly specified. In this International Standard, the test duct is of circular cross-section and termina

44、ted anechoically. Details of typical anechoic terminations are given in Annex E. The sound power obtained under these special conditions is a representative value for actual applications, as the anechoic termination forms an impedance about midway between the higher and lower impedances found in pra

45、ctice. The sound power radiated in actual applications can, in theory, be estimated from data on air-moving devices and duct impedances. Since this information is at present incomplete, these effects are not usually considered in acoustical calculations. In order to suppress the turbulent pressure f

46、luctuations at the microphone, the use of a long cylindrical windscreen (“sampling tube”) is preferred. The microphone, with the sampling tube, is mounted at a radial position such that the sound pressure is well related to the sound power by the plane wave formula to an acceptable extent, even in t

47、he frequency range in which higher-order acoustic modes are possible. The uncertainty of measurement (see Clause 4) is given in terms of the standard deviation to be expected if the measurements were repeated in many different laboratories. The procedures for measuring the operating conditions (perf

48、ormance measurements) are not specified in detail in this International Standard. The operating conditions are specified in ISO 5801. This International Standard is one of a series specifying different methods for determining the sound power levels of fans and other air-moving devices. In general, t

49、he sound powers radiated from a fan inlet or outlet into free space and into a duct are different because of the reflection of sound energy at the fan inlet or outlet plane when there is no connected duct. The in-duct method according to this International Standard is suitable for determining the sound power radiated into a duct by a fan inlet or outlet. The sound power radiated into free space by a fan inlet or outlet should be determined using the a reverberation room