1、January 2011 Translation by DIN-Sprachendienst.English price group 25No 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).IC
2、S 17.140.20; 35.020!$m,W“1740952www.din.deDDIN EN ISO 7779Acoustics Measurement of airborne noise emitted by information technology andtelecommunications equipment (ISO 7779:2010)English translation of DIN EN ISO 7779:2011-01Akustik Geruschemissionsmessung an Gerten der Informations- undTelekommunik
3、ationstechnik (ISO 7779:2010)Englische bersetzung von DIN EN ISO 7779:2011-01Acoustique Mesurage du bruit arien mis par les quipements lis aux technologies de linformationet aux tlcommunications (ISO 7779:2010)Traduction anglaise de DIN EN ISO 7779:2011-01SupersedesDIN EN ISO 7779:2002-10 andDIN EN
4、ISO 7779/A1:2003-09www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.700 .11 2DIN EN ISO 7779:2011-01 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 43 “Acoust
5、ics”, Subcommittee SC 1 “Noise” (Secretariat: DS, Denmark), Working Group WG 23 “Measurement of noise from information technology, business and telecommunications equipment” in collaboration with Technical Committee CEN/TC 211 “Acoustics” (Secretariat: DS, Denmark). The responsible German bodies inv
6、olved in its preparation were the Normenausschuss Akustik, Lrm-minderung 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, Minderung, Dat
7、ensammlung and the Normenausschuss Informations-technik und Anwendungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 226 DIN ISO 226 ISO 11201 DIN EN ISO 11201 ISO 389-7 DIN EN ISO 389-7 ISO 11203 DIN EN ISO 11203 ISO 3741 DIN EN IS
8、O 3741 ISO 12001 DIN EN ISO 12001 ISO 3744 DIN EN ISO 3744 ISO 80000-8 DIN EN ISO 80000-8 ISO 3745 DIN EN ISO 3745 IEC 60942 DIN EN 60942 ISO 6926 DIN EN ISO 6926 IEC 61260 DIN EN 61260 ISO 9295 DIN EN 29295 IEC 61672-1 DIN EN 61672-1 The national standards are listed in Annex NA. Amendments This st
9、andard differs from DIN EN ISO 7779:2002-10 and DIN EN ISO 7779/A1:2003-09 as follows: a) the standard has been brought in line with the amended framework standards of the DIN EN ISO 3741 and DIN EN ISO 11201 standards series as regards, for example, definitions, instrumentation and calibration, cal
10、culation of band sound power levels, determination of A-weighted sound power levels in reverberation test rooms and in free field conditions over a reflecting plane, calculation of band emission sound pressure levels and of A-weighted levels, information to be recorded and reported; b) the permissib
11、le measurement surfaces have been extended to include cylindrical measurement surfaces (Annex B); c) for detailed installation and operating conditions for specific equipment categories (Annex C), reference is now made to ECMA-74; d) Annex D “Identification and evaluation of prominent discrete tones
12、” has been revised with regard to the tone-to-noise ratio method and the prominence ratio method e) the standard has been revised in form and substance. Previous editions DIN 45635-19: 1978-08, 1989-09 DIN EN 27779: 1991-11 DIN EN ISO 7779: 2002-10 DIN EN ISO 7779/A1: 2003-09 DIN EN ISO 7779:2011-01
13、 3 National Annex NA (informative) Bibliography DIN EN 29295, Acoustics Measurement of high-frequency noise emitted by computer and business equipment DIN EN 60942, Electroacoustics Sound calibrators DIN EN 61260, Electroacoustics Octave-band and fractional-octave-band filters DIN EN 61672-1, Electr
14、oacoustics Sound level meters Part 1: Specifications DIN EN ISO 389-7, Acoustics Reference zero for the calibration of audiometric equipment Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions DIN EN ISO 3741, Acoustics Determination of sound power levels o
15、f noise sources using sound pressure Precision methods for reverberation rooms DIN EN ISO 3744, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over a reflecting plane DIN EN ISO 3745, Acoustics Determination of soun
16、d power levels and sound energy levels of noise sources using sound pressure Precision methods for anechoic and hemi-anechoic rooms DIN EN ISO 6926, Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels DIN EN ISO 11201
17、, Acoustics Noise emitted by machinery and equipment Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections DIN EN ISO 11203, Acoustics Noise emitted by machiner
18、y and equipment Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level DIN EN ISO 12001, Acoustics Noise emitted by machinery and equipment Rules for the drafting and presentation of a noise test code DIN EN ISO 80000-8, Quantiti
19、es and units Part 8: Acoustics DIN ISO 226, Acoustics Normal equal-loudness-level contours DIN EN ISO 7779:2011-01 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7779 August 2010 ICS 17.140.20; 35.020 Supersedes EN ISO 7779:2001English Version Acoustics -
20、 Measurement of airborne noise emitted by Acoustique - Mesurage du bruit arien mis par les quipements lis aux technologies de linformation et aux tlcommunications (ISO 7779:2010) Akustik - Geruschemissionsmessung an Gerten der This European Standard was approved by CEN on 26 July 2010. CEN members a
21、re 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 such national standards may be obtained on application to
22、 the CEN 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 responsibility of a CEN member into its own language and notified to the CEN Management Centre has the sa
23、me status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, P
24、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any me
25、ans reserved worldwide for CEN national Members. Ref. No. EN ISO 7779:2010: Einformation technology and telecommunications equipment (ISO 7779:2010) Informations- und Telekommunikationstechnik (ISO 7779:2010) Contents DIN EN ISO 7779:2011-01 EN ISO 7779:2010 (E) 2 Page Foreword3 Introduction .4 1 Sc
26、ope 5 2 Normative references 6 3 Terms and definitions .6 4 Conformity requirements10 5 Installation and operating conditions10 6 Method for determination of sound power levels of equipment in reverberation test rooms.13 7 Method for determination of sound power levels of equipment under essentially
27、 free-field conditions over a reflecting plane .19 8 Method for determination of emission sound pressure levels at defined operator and bystander positions.24 9 Information to be recorded and reported31 Annex A (normative) Test accessories.36 Annex B (normative) Measurement surfaces.39 Annex C (norm
28、ative) Installation and operating conditions for specific equipment categories44 Annex D (informative) Identification and evaluation of prominent discrete tones.45 Annex E (informative) Detection of impulsive noise .63 Bibliography 65 Foreword This document (EN ISO 7779:2010) has been prepared by Te
29、chnical Committee ISO/TC 43 Acoustics” in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS. 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 Febr
30、uary 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 subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such pate
31、nt rights. This document supersedes EN ISO 7779:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finla
32、nd, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7779:2010 has been approved by CEN as a EN IS
33、O 7779:2010 without any modification. “DIN EN ISO 7779:2011-01 EN ISO 7779:2010 (E) 3 Introduction This International Standard specifies methods for the measurement of airborne noise emitted by information technology and telecommunications (ITT) equipment. Hitherto, a wide variety of methods have be
34、en applied by individual manufacturers and users to satisfy particular equipment or application needs. These diverse practices have, in many cases, made comparison of noise emission difficult. This International Standard simplifies such comparisons and is the basis for the declaration of the noise e
35、mission levels of ITT equipment. In order to ensure accuracy, validity and acceptability, this International Standard is based on the basic International Standards for determination of the sound power level and for determination of the emission sound pressure level at the operator position(s) and by
36、stander position(s). Furthermore, implementation is simplified by conformity with these International Standards. In many cases, free-field conditions over a reflecting plane are realised by hemi-anechoic rooms. These rooms may be particularly useful during product design to locate and to improve ind
37、ividual contributing noise sources. Reverberation rooms may be more economical for production control and for obtaining sound power levels for noise emission declaration purposes. The method for measuring the emission sound pressure level at the operator or bystander positions (based on ISO 11201) i
38、s specified in a separate clause, as this level is not considered to be primary noise emission declaration information. The measurements can, however, be carried out in conjunction with those for sound power determination in a free field over a reflecting plane. For comparison of similar equipment,
39、it is essential that the installation conditions and mode of operation be the same. In Annex C these parameters are standardized for many categories of equipment. This International Standard is based on ECMA-74. DIN EN ISO 7779:2011-01 EN ISO 7779:2010 (E) 4 1 Scope This International Standard speci
40、fies procedures for measuring and reporting the noise emission of information technology and telecommunications equipment. NOTE 1 This International Standard is considered part of a noise test code (see 3.1.2) for this type of equipment, and is based on basic noise emission standards (see 3.1.1) ISO
41、 3741, ISO 3744, ISO 3745 and ISO 11201. The basic emission quantity is the A-weighted sound power level which may be used for comparing equipment of the same type but from different manufacturers, or for comparing different equipment. Three basic noise emission standards for determination of the so
42、und power levels are specified in this International Standard in order to avoid undue restriction on existing facilities and experience. ISO 3741 specifies comparison measurements in a reverberation test room; ISO 3744 and ISO 3745 specify measurements in an essentially free field over a reflecting
43、plane. Any one of these three basic noise emission standards can be selected and used exclusively in accordance with this International Standard when determining sound power levels of a machine. The A-weighted sound power level is supplemented by the A-weighted emission sound pressure level determin
44、ed at the operator position(s) or the bystander positions, based on basic noise emission standard ISO 11201. This sound pressure level is not a workers immission rating level, but it can assist in identifying any potential problems that could cause annoyance, activity interference, or hearing damage
45、 to operators and bystanders. Methods for determination of whether the noise emission includes prominent discrete tones or is impulsive in character are specified in Annexes D and E, respectively. This International Standard is suitable for type tests and provides methods for manufacturers and testi
46、ng laboratories to obtain comparable results. The methods specified in this International Standard allow the determination of noise emission levels for a functional unit (see 3.1.4) tested individually. The procedures apply to equipment which emits broad-band noise, narrow-band noise and noise which
47、 contains discrete-frequency components, or impulsive noise. The sound power and emission sound pressure levels obtained can serve noise emission declaration and comparison purposes (see ISO 9296). NOTE 2 The sound power and emission sound pressure levels obtained are not to be considered as install
48、ation noise immission levels; however, they can be used for installation planning (see ECMA TR/274). If sound power levels obtained are determined for a number of functional units of the same production series, they can be used to determine a statistical value for that production series (see ISO 929
49、6). DIN EN ISO 7779:2011-01 EN ISO 7779:2010 (E) 5 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 266, Acoustics Preferred frequencies ISO 3741, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for
