DIN EN ISO 9295-2015 Acoustics - Determination of high-frequency sound power levels emitted by machinery and equipment (ISO 9295 2015) German version EN ISO 9295 2015《声学 机械和设备高频声功率.pdf

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1、September 2015Translation by DIN-Sprachendienst.English price group 13No part of this translation 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).I

2、CS 17.140.20; 35.180; 35.260; 35.160!%F07“2351320www.din.deDDIN EN ISO 9295Acoustics Determination of highfrequency sound power levels emitted bymachinery and equipment (ISO 9295:2015);English version EN ISO 9295:2015,English translation of DIN EN ISO 9295:201509Akustik Bestimmung der hochfrequenten

3、 Schallleistungspegel von Maschinen und Gerten(ISO 9295:2015);Englische Fassung EN ISO 9295:2015,Englische bersetzung von DIN EN ISO 9295:2015-09Acoustique Dtermination des niveaux de puissance haute frquence mis par les machines etquipements (ISO 9295:2015);Version anglaise EN ISO 9295:2015,Traduct

4、ion anglaise de DIN EN ISO 9295:2015-09SupersedesDIN EN 29295:1991-11www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 27 pages08.15 DIN EN ISO 9295:2015-09 2 A comma is used as the decimal marker. National foreword This standard (EN ISO

5、9295:2015) has been prepared by Technical Committee ISO/TC 43 “Acoustics”, Subcommittee SC 1 “Noise” (Secretariat: DIN, Germany), Working Group WG 28 “Basic machinery noise emission standards” in collaboration with Technical Committee CEN/TC 211 “Acoustics” (Secretariat: DIN, Germany). The responsib

6、le German body involved in its preparation was the Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, Noise Control and Vibration Engineering Standards Committee in DIN and VDI), Working Committee NA 001-01-04 AA Geruschemission von Maschinen und Anlagen; Messung

7、, Minderung, Datensammlung. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3741 DIN EN ISO 3741 ISO 3744 DIN EN ISO 3744 ISO 3745 DIN EN ISO 3745 ISO 6926 DIN EN ISO 6926 ISO 7779 DIN EN ISO 7779 ISO/IEC Guide 98-3 DIN V ENV 13005 The

8、German Standards are given in National Annex NA “Bibliography”. Amendments This standard differs from DIN EN 29295:1991-11 as follows: a) the scope has been extended to include all machinery and equipment; b) reference to ISO 7779 has been replaced by reference to ISO 3741 and ISO 3744; c) requireme

9、nts and recommended meteorological conditions have been merged; d) symbols and designations have been brought in line with the revised basic standards ISO 3741 and ISO 3744; e) calculated sound power levels have been converted to reference meteorological conditions; f) the calculation of A-weighted

10、sound power levels has been deleted; g) Clause 11 “Measurement uncertainty” has been added; h) the former Annex A on coaxial circular paths for microphone traverses has been deleted; i) the calculation of the air absorption coefficient (Annex A) has been corrected; j) the standard has been editorial

11、ly revised. Previous editions DIN EN 29295: 1991-11 DIN EN ISO 9295:2015-09 3 National Annex NA (informative) Bibliography DIN V ENV 13005, Guide to the expression of uncertainty in measurement DIN EN ISO 3741, Acoustics Determination of sound power levels and sound energy levels of noise sources us

12、ing sound pressure Precision methods for reverberation test rooms DIN EN ISO 3744, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane DIN EN ISO 3745, Acoustics Determin

13、ation of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for anechoic rooms and hemi-anechoic rooms DIN ISO 6926, Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels

14、DIN EN ISO 7779, Acoustics Measurement of airborne noise emitted by information technology and tele-communications equipment DIN EN ISO 9295:2015-09 4 This page is intentionally blank EN ISO 9295May 2015 ICS 17.140.20; 35.020 Supersedes EN 29295:1991English Version Acoustics - Determination of high-

15、frequency sound power levels emitted by machinery and equipment (ISO 9295:2015) Acoustique - Dtermination des niveaux de puissance acoustique haute frquence mis par les machines et quipements (ISO 9295:2015) Akustik - Bestimmung der hochfrequentenSchallleistungspegel von Maschinen und Gerten(ISO 929

16、5:2015)This European Standard was approved by CEN on 21 February 2015. 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 bibliograph

17、ical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 responsibilit

18、y of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of

19、 Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 201

20、5 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 9295:2015 EEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGContents Page Forewor

21、d . 4 Introduction . 5 1 Scope . 6 2 Normative references. 6 3 Terms and definitions 6 4 Conformity requirements 6 5 Requirements for measurements in a reverberation test room 6 5.1 General 6 5.2 Meteorological conditions . 7 5.3 Instrumentation 7 5.4 Installation and orientation of microphone . 7 5

22、.5 Installation and orientation of equipment 8 5.6 Calibration of measurement system 8 5.7 Measurement of sound pressure level. 8 6 Method using measured reverberation time . 9 6.1 General 9 6.2 Measurement of reverberation time . 10 6.3 Calculation of room absorption 10 6.4 Installation of micropho

23、ne and equipment 10 6.5 Measurement of sound pressure level. 10 6.6 Calculation of sound power level . 11 7 Method using calculated air absorption 11 7.1 General 11 7.2 Calculation of room constant . 11 7.3 Installation of microphone and equipment 11 7.4 Measurement of sound pressure level. 11 7.5 C

24、alculation of sound power level . 12 8 Method using a reference sound source . 13 8.1 Reference sound source . 13 8.2 Installation of microphone and equipment 13 8.3 Installation of reference sound source 14 8.4 Measurement of sound pressure level. 14 8.5 Calculation of sound power level . 14 8.5.1

25、Equipment emitting broad-band noise 14 8.5.2 Equipment emitting discrete tone(s) 15 9 Method using a free field over a reflecting plane . 15 9.1 General 15 9.2 Meteorological conditions . 15 9.3 Instrumentation 16 9.4 Installation and orientation of microphone . 16 9.5 Installation of equipment . 16

26、 9.6 Calibration of measurement system 16 9.7 Measurement of sound pressure level. 17 9.8 Calculation of surface sound pressure level and sound power level 17 10 Calculation of sound power level under reference meteorological conditions 18 10.1 Reverberation rooms . 18 10.2 Hemi-anechoic rooms 18 11

27、 Measurement uncertainty 18 2DIN EN ISO 9295:2015-09 EN ISO 9295:2015 (E) 12 Information to be recorded . 18 12.1 General 18 12.2 Equipment under test 18 12.3 Acoustic environment 19 12.4 Instrumentation 19 12.5 Acoustical data . 19 13 Information to be reported 19 Annex A (normative) Calculation of

28、 air absorption coefficient . 21 Bibliography 23 3DIN EN ISO 9295:2015-09EN ISO 9295:2015 (E)ForewordThis document (EN ISO 9295:2015) has been prepared by Technical Committee ISO/TC 43 “Acoustics” in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DI

29、N. 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 November 2015, and conflicting national standards shall be withdrawn at the latest by November 2015. Attention is drawn to the possibility that s

30、ome of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 29295:1991. According to the CEN-CENELEC Internal Regulations, the national standards organizations of

31、 the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Neth

32、erlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 9295:2015 has been approved by CEN as EN ISO 9295:2015 without any modification. 4DIN EN ISO 9295:2015-09 EN ISO 9295:2015 (E) IntroductionSom

33、e machinery and equipment emit high-frequency noise which might be broad-band noise (e.g. paper noise of high-speed printing) or narrow-band noise and discrete tones (e.g. noise of switching power supplies and video display units or medical devices).This International Standard specifies methods for

34、the determination of the sound power levels in the frequency range covered by the octave band centred at 16 kHz. The measured levels are not frequency-weighted. The principal objective of this International Standard is to prescribe methods for determining the sound power levels and frequencies of to

35、nes which are contained within the 16 kHz octave band.5DIN EN ISO 9295:2015-09EN ISO 9295:2015 (E)1 ScopeThis International Standard specifies four methods for the determination of the sound power levels of high-frequency noise emitted by machinery and equipment in the frequency range covered by the

36、 octave band centred at 16 kHz, which includes frequencies between 11,2 kHz and 22,4 kHz. They are complementary to the methods described in ISO 3741 and ISO 3744. The first three methods are based on the reverberation test room technique. The fourth method makes use of a free field over a reflectin

37、g plane.The test conditions which prescribe the installation and operation of the equipment are those specified in ISO 3741 or ISO 3744 as applicable.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicat

38、ion. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3741, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods

39、for reverberation test roomsISO 3744, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting planeISO 6926, Acoustics Requirements for the performance and calibration of reference

40、 sound sources used for the determination of sound power levelsISO 9613-1, Acoustics Attenuation of sound during propagation outdoors Part 1: Calculation of the absorption of sound by the atmosphere3 Terms and definitionsFor the purpose of this document, the terms and definitions given in ISO 3741 a

41、nd ISO 3744 apply.4 Conformity requirementsA method for the measurement of high-frequency noise is in conformance with this International Standard if it satisfies all the mandatory requirements of one of the four methods described herein specified in Clauses 6 to 9, and if the information recorded a

42、nd reported is as specified in Clauses 12 and 13, respectively.5 Requirements for measurements in a reverberation test room5.1 GeneralThis International Standard describes three methods using the reverberation test room technique of ISO 3741. The first and the second methods are usually called “dire

43、ct methods” because they use directly measured or calculated reverberation times. The third method is a so-called “comparison method”. A calibrated reference sound source is used from which the sound power levels of the equipment are determined by comparison.6DIN EN ISO 9295:2015-09 EN ISO 9295:2015

44、 (E) All three methods require a determination of the mean time-averaged sound pressure level in the reverberant field.As instrumentation and basic measurement techniques are the same for all three methods, they are summarized in 5.3 to 5.7. Additional requirements specific to each method are given

45、separately. For additional requirements on instrumentation, see ISO 3741.5.2 Meteorological conditionsThe air absorption in the reverberation test room varies with temperature and humidity, particularly at frequencies above 1 000 Hz. The temperature, , in degrees Celsius (C) and the relative humidit

46、y, hr, expressed as a percentage, shall be controlled during the sound pressure level measurements.The product, hr ( + 5 C), shall not vary by more than 10 % during the measurements.For equipment whose noise emissions intentionally vary with ambient temperature (e.g. by varying the speeds of air mov

47、ing devices), the room temperature during the test measurement shall be 23 C 2 C or, if the room temperature is outside these limits, the fan shall be adjusted to the speed for an ambient temperature of 23 C 2 C.The following conditions are recommended: Static pressure: 86 kPa to 106 kPa; Temperatur

48、e: 15 C to 30 C; Relative humidity: 40 % to 70 %.NOTE As indicated in Tables 1 and 2 for the temperature range of 18 C to 27 C, higher temperatures and higher humidity will tend to minimize the effects of atmospheric absorption.5.3 InstrumentationThe sound measuring system, including the microphone, should have a flat frequency response for random incident sound in the 16 kHz octave band. The microphone response shall be corrected to give a flat frequency response within in the 16 kHz oc