1、 ETSI EN 300 753 V1.3.1 (2012-01) Environmental Engineering (EE); Acoustic noise emitted by telecommunications equipment European Standard ETSI ETSI EN 300 753 V1.3.1 (2012-01) 2Reference REN/EE-00025 Keywords acoustic, emission, environment, noise ETSI 650 Route des Lucioles F-06921 Sophia Antipoli
2、s Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present d
3、ocument may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of t
4、he PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/
5、status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction e
6、xtend to reproduction in all media. European Telecommunications Standards Institute 2012. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Memb
7、ers and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI EN 300 753 V1.3.1 (2012-01) 3Contents Intellectual Property Rights 5g3Foreword . 5g3Introduction 5g31 Scope 7g32 References 7g32.1 Normative references . 7g32.2 In
8、formative references 8g33 Definitions and symbols . 8g33.1 Definitions 8g33.2 Symbols 10g34 Measurement methodology 10g35 Installation and operation of equipment . 10g35.1 Equipment installation 10g35.2 Equipment operation “in-use“ 10g35.2.1 Variable emissions - standard temperature test . 10g35.2.2
9、 Variable emissions - high temperature test . 11g36 Acoustic noise emission limits . 11g37 Information to be recorded . 12g38 Information to be reported 13g39 Verification of declared A-weighted sound power levels 13g3Annex A (normative): Measurement methods for acoustic noise emission from open air
10、 outdoor equipment . 14g3A.1 Scope 14g3A.2 Source directionality. 14g3A.3 Installation and operation of equipment . 14g3A.3.1 Daytime simulation 14g3A.3.2 Night-time simulation . 14g3A.4 Information to be recorded . 15g3A.5 Information to be reported 15g3Annex B (informative): Recommended sound powe
11、r limits for open air outdoor equipment 16g3Annex C (informative): Recommended method for the detection and reporting of prominent discrete tones 18g3Annex D (informative): Motivation for the present document . 19g3Annex E (informative): The relationship between sound power and sound pressure . 20g3
12、Annex F (informative): Sound power measurement methods . 21g3F.1 Free field over a reflecting plane technique . 21g3F.1.1 Concept 21g3F.1.2 Measurement procedure . 21g3F.2 Reverberation room technique . 21g3F.2.1 Concept 21g3ETSI ETSI EN 300 753 V1.3.1 (2012-01) 4F.2.2 Measurement procedure . 21g3F.
13、3 Anechoic and semi-anechoic rooms . 22g3F.3.1 Concept 22g3F.3.2 Measurement procedure . 22g3History 23g3ETSI ETSI EN 300 753 V1.3.1 (2012-01) 5Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to t
14、hese essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Late
15、st updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
16、 server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE). National transposition dates Date of adoption of this EN: 16 January 2012 Date of latest announcement of
17、 this EN (doa): 30 April 2012 Date of latest publication of new National Standard or endorsement of this EN (dop/e): 31 October 2012 Date of withdrawal of any conflicting National Standard (dow): 31 October 2012 Introduction Compatibility with the end-use environment is a primary concern for purchas
18、ers and manufacturers of telecommunications equipment. An important compatibility issue is the amount of acoustic noise emitted by the equipment. The present document is intended to meet four primary needs of purchasers and manufacturers with regard to this issue: - specification of acoustic noise e
19、mission measurement methods; - specification of acoustic noise emission limits; - specification of a method for reporting acoustic noise emission; - specification of a method for verification of declared noise emission values. To develop practical specifications and to have the capacity to make fair
20、 comparisons between equipment, it is essential to have a single, technically established method for the measurement of acoustic emission. Therefore, the present document specifies the use of sound power measurement and, more specifically, adopts ISO 7779 1 as the primary measurement document. Sound
21、 power levels can be used for direct comparison of noise emission for functionally similar equipment manufactured by different vendors, and/or in the calculation of estimated sound pressure levels for spaces where the equipment is to be installed. The use of sound power level, instead of emission so
22、und pressure level, as the specified quantity for product noise emission has clear precedent within the international noise control community. The acceptability of the acoustic emission from a piece of equipment depends upon a number of details that vary from installation to installation, and the nu
23、mber of possible installations is extensive. Accordingly, the goal of the present document is to specify limits that are applicable to the major installation categories. ETSI ETSI EN 300 753 V1.3.1 (2012-01) 6The fundamental concern prompting the development of the present document is the potential
24、adverse impact that excessive equipment noise can have on people. For that reason, the impact of noise upon human activities has been carefully considered, and the intent has been to ensure that the acoustic noise emitted is at, or below, generally accepted levels. The perceptual issues considered i
25、ncluded task concentration, speech communication, annoyance and other similar parameters. Generally, the relevant noise exposure levels are well below those needed to ensure worker safety and health. Requirements related to worker safety and health (including those related to infrasound and ultrasou
26、nd) can be found in EC Directive 2003/10/EC 4. The present document specifies that manufacturers report measured A-weighted sound power values for equipment. Given that it is impractical and unnecessary to measure every manufactured unit, the reported sound power value should be one that all, or nea
27、rly all, units of a particular model will not exceed. This means that the reported value needs to take into account both production variation and the precision of the measurement method. ISO 9296 2 specifies methods that address these issues and is therefore specified in the present document as the
28、method for declaring sound power values. ISO 9296 2 also specifies a method for verification of declared sound power values. For further information regarding the motivation for the development of the present document, see annex D. ETSI ETSI EN 300 753 V1.3.1 (2012-01) 71 Scope The present document
29、specifies acoustic noise emission limits for equipment used in telecommunication locations as specified in the EN 300 019-1 3 series. The present document covers switching, transmission, power, supervisory, as well as tariff and billing equipment. The present document also specifies methods for meas
30、uring, reporting and verifying the noise emission of telecommunications equipment. The details of the methods are found in ISO 7779 1, ISO 9296 2 and in the basic standards ISO 3741:2010 7, ISO 3744:2010 8 and ISO 3745 9. The descriptor used to quantify acoustic noise emission is the declared A-weig
31、hted sound power level in units of bels. The limits contained herein apply only to the airborne acoustic noise generated by equipment during normal operation. That is, the limits do not apply when operating under emergency conditions or when the equipment is being serviced. Also, the limits do not a
32、pply to equipment features which produce sound as an intentional aspect of their operation, e.g. alarm signals, attention signals, speech signals and so on. (For more information on that topic, see ETR 116 i.1). Furthermore, the present document does not specify maximum sound pressure level limits i
33、n specific environments. Contained within the present document are 6 annexes. Annex A specifies methods for measuring the acoustic noise emitted from equipment manufactured for open air outdoor locations. Annex B contains tables of recommended A-weighted sound power limits for open air outdoor equip
34、ment. Annex C discusses the emission of pure tones from equipment. Annex D reviews the motivation for the creation of the present document. Annex E discusses the relationship between sound power and sound pressure. Annex F briefly summarizes the sound power measurement methods used within the presen
35、t document. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amend
36、ments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1
37、Normative references The following referenced documents are necessary for the application of the present document. 1 ISO 7779: “Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment“. 2 ISO 9296: “Acoustics - Declared noise emission values of co
38、mputer and business equipment“. 3 ETSI EN 300 019-1: “Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1: Classification of environmental conditions“. 4 Directive 2003/10/EC of the European Parliament and of the Council of 6 Febr
39、uary 2003 on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (noise). NOTE: OJ L 42, 15.02.2003 p.38-44. 5 Void. 6 ECMA TR/27: “Method for the Prediction of Installation Noise Levels“. ETSI ETSI EN 300 753 V1.3.1 (2012-01) 87 ISO
40、 3741:2010: “Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for reverberation test rooms“. 8 ISO 3744:2010: “Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressur
41、e - Engineering methods for an essentially free field over a reflecting plane“. 9 ISO 3745:2003: “Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms“. 2.2 Informative references The following referenced docum
42、ents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 ETSI ETR 116 (1994): “Human Factors (HF); Human factors guidelines for ISDN Terminal equipment design“. 3 Definitions and symbols 3.1 Definitions For the purposes
43、 of the present document, the following terms and definitions apply: A-weighting filter: response characteristic of a filter used in acoustic measurement systems which attenuates low frequency and high frequency acoustic energy NOTE: This filter is used to provide a frequency response characteristic
44、 similar to that of the human auditory system. business area: area where the principal activity is office / clerical work or similar activities NOTE: These areas typically contain multiple single-person work areas. Sound levels should be low enough to provide good conditions for task concentration a
45、nd speech communication. daytime: part of the day considered to extend over normal waking hours NOTE: Typically, the period during which people are most likely to be engaged in activities related to business, education, active recreation, etc. declared A-weighted sound power level (LWAd): statistica
46、l maximum A-weighted sound power level for manufactured units, taking into account tolerances of production and measurement variance, described in ISO 9296 2 NOTE: Typically, LWAd is 0,3 bels higher than the A-weighted sound power level measured on an average manufactured unit. LWAdis used for all e
47、quipment classes and in the specification of noise emission limits. Units: bels. free field over a reflecting plane: sound field in a homogeneous, isotropic medium in the half-space above an infinite, rigid plane surface on which the source is located functional unit: entity of physical equipment, w
48、hich has been allocated an identification number, capable of accomplishing a specified task NOTE 1: A functional unit may be supported by a frame or frames and may be self-enclosed or designed to be attached to another device. NOTE 2: An end-use enclosure in the form of a rack, populated with sub-as
49、semblies or other functional units, may be considered a functional unit whether or not it has a separate identification number. hemi-anechoic room: room in which a free field over a reflecting plane is obtained ETSI ETSI EN 300 753 V1.3.1 (2012-01) 9high temperature A-weighted sound power level (HLWAd): statistical maximum A-weighted sound power level for manufactured units, taking into account tolerances of production and measurement variance NOTE: The method for determining the high temperature A-weighted sound power level
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