1、BRITISH STANDARD Acoustics - Recommended practice for the design of low-noise workplaces containing machinery Part 2. Noise control measures The European Standard EN IS0 11690-2 : 1996 has the status of a British Standard ICs 13.140; 17.140.20 BS EN IS0 11690-2 : 1997 NO COPYING WITHOUT BSI PERMISSI
2、ON EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 11690-2 : 1997 Amd. No. National foreword Date Text affected This British Standasd is the English language version of EN IS0 11690-2 : 1996. It is identical with IS0 11690-2 : 1996. The UK participation in its preparation was entrusted by Technical C
3、ommittee EW1, Acoustics, to Subcommittee EWl/4, Machinery noise, which has the responsibiity to: - aid enquirers to understand the text, - present to the responsible internationaUEuropean committee any enquiries on the interpretation, or proposah for change, and keep the TJK interests informed; - mo
4、nitor related international and European developments and promulgate themintheuK. A list of organizations represented on this subcommittee can be obtained on recluest to its secretary. Cross-references Attention is drawn to the fact that annex ZA lists nonnative references to international pubiicati
5、ons with their corresponding European publications. The I British Stcuidasds which implement these intemational or European publications may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or using the Fnd facility of the BSI Stcuidard
6、s Electronic Catalogue. 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 cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii to v, a blank page, pages
7、 1 to 26, the annex ZA page, a blank page, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the Heaith and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1997 O BSI 1997 ISBN
8、O 580 27285 O STD*BSI BS EN IS0 LLbSO-Z-ENGL 1797 1b2LibbS Ob35155 7b4 = EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 11690-2 November 1996 ICs 13.140 Descriptors: See IS0 document English version Acoustics - Recommende practice for the design of low-noise workplaces containing machinery
9、 - Part 2: Noise control measures (IS0 1 1690-2: 1 996) Acoustique - Pratique recannande pour la conception de lieux de travail bruit rduit contenant des machines - Partie 2: Moyens de rduction du bruit (IS0 11690-2:1996) Akustik - Richtlinien fr die Gestaltung lrmrmer maschinenbertckter Arbeitssttt
10、en - Teil 2: Lrmminderungsrnatlnahmen (IS0 11690-2:1996) This European Standard was approved by CEM on 1996-10-16. CEN members are bwnd to comply with the CENKENELEC Internal Regulations which stipitate the conditions for giving this European Standard the status of a national standard without any al
11、teration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN mnnber. lhe European Standards exist in three official versions (English, French, German). A version in any other language made by tran
12、slation under the responsibility of a CEN menber into its own language and notified to the Central Secretariat haS.th9 sane status asthe official versions. CEM mnnbers are the national standards bodies of Austria, Belgiun, Dmierk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg
13、, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Comnittee for Standardization Comit Europen de Normalisation Europisches Kanitee fr Normung Central Secretariat: rue de Stassart,36 8-1050 Bruuelr 0 1996 Copyright reserved to CEM mcmkrs Ref. NO. EN IS0 1169
14、0-2:1996 E STD*BSI BS EN IS0 LLbSO-Z-ENGL 1777 = 1b2qbb7 Ob35L5b bTO D EN IS0 11690-2 : 1996 Foreword The text of the International Standard IS0 1 1690-2: 1 996 has been prepared by Technical Committee ISOTTC 43 “Acoustics“ in collaboration with Technical Committee CEN/TC 21 1 “Acoustics“, the secre
15、tariat 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 month of May 1997, and conflicting national standards shall be withdrawn at the latest by month of May 1997. Accordin
16、g to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swi
17、tzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 1 1690-2:1996 was approved by CEN as a European Standard without any modification. STD*BSI BS EN IS0 LLb90-2-ENGL 1977 162Vbb7 Ob35157 537 EN IS0 11690-2 : 1996 INTERNATIONAL STANDARD IS0 1 1690-2 First ed
18、ition 1996-1 1-01 Acoustics - Recommended practice for the design of low-noise workplaces containing machinery - Part 2: Noise control measures Acoustique - Pratique recommande pour la conception de lieux de travail bruit rduit contenant des machines - Partie 2: Moyens de rduction du bruit Reference
19、 number IS0 11 690-2:1996(E) STD-BSI BS EN IS0 LLbSO-2-ENGL 3997 lb24bb7 Ob35358 473 EN IS0 11690-2 : 1996 Contents scope . Normative reference . Definitions . Technical aspects of noise control . Noise control at source . Noise control on the transmission path Noise control at the work station Veri
20、fication methods . New technologies . Annexes A B C D E F G H I J K Modification or replacement of machine components Arrangement of sound sources Enclosures Silencers . Noise barriers and screens in rooms Acoustical treatment of surfaces Structure-borne sound insulation Airborne sound insulation of
21、 partitions . Noise control at the work station Example of a new technology . Bibliography Page 1 1 1 1 2 6 8 8 10 11 12 13 15 16 17 19 20 21 22 24 escriptors: acoustics. machinery. noise (sound). engine noise. noise reduction. workplaces. design. implementation . ii EN IS0 11690-2 : 1996 Foreword I
22、S0 (the Intemational Organization for Standardization) is a worldwide fed- eration of national standards bodies (IS0 member bodies). The work of preparing International Standards is normalty carried out through IS0 technical committees. Each member body interested in a subject for which a technical
23、committee has been established has the right to be represented on that committee. Intemational organizations, governmental and non- governmental, in liaison with ISO, also take part in the work. IS0 coilabo- rates closely with the International Electrotechnical Commission (IEC) on all matters of ele
24、ctrotechnical standardization. Draft Intemational Standards adopted by the technical committees are cir- culated to the member bodies for voting. Publication as an Intemational Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 1 1690-2 was pr
25、epared by Technical Committee ISOTTC 43, Acoustics, Subcommittee SC 1, Noise. IS0 11690 consists of the following parts, under the general title Acous- tics - Recommended practice for the design of low-noise workplaces containing machinew: - Part 1: Noise control strategies - Part 2: Noise control m
26、easures - Part 3: Sound propagation and noise prediction in workrooms Part 1 is the central document in the series. Parts 2 and 3 give additional technical and explanatory information. It is therefore recommended to start with part 1. Annexes A to K of this patt of IS0 11690 are for information only
27、. iii Introduction Most of the existing Intemational Standards prepared in ISOTTC 43BC 1 specify methods for measurement and/or evaluation of noise. The final objective of IS0 11690, however, is noise reduction. A number of noise control measures are offered. However, in order to be effective, the m
28、ost appropriate noise control measure) should be chosen for a given situation. It is important when non-acoustic engineers are involved in noise control practice for these engineers to have a basic knowledge of noise emission and propagation characteristics and to understand the basic principles of
29、noise control. To assist in the development of noise control in the workplace, it is essen- tial that the information contained in these recommended practices is dis- seminated through Intemational Standards. In order to reduce noise as a hazard in the workplace, individual countries have produced n
30、ational legislation. Generally, such national legislation requires noise control measures to be carried out in order to achieve the lowest reasonable levels of noise emission, noise immission and noise ex- posure, taking into account: - known available measures; - - - the state of the art regarding
31、technical progress; the treatment of noise at source; appropriate planning, procurement and installation of machines and equipment . This part of IS0 11690, together with the two other parts in the series, out- lines procedures to be considered when dealing with noise control at workplaces, within w
32、orkrooms and in the open. These recommended prac- tices give in relatively simple terms the basic information necessary for all parties involved in noise control in workplaces and in the design of low- noise workplaces to promote the understanding of the desired noise control requirements. The purpo
33、se of the IS0 11690 series is to bridge the gap between existing literature on noise control and the practical implementation of noise control measures. In principle, the series applies to all workplaces and its main function is: - to provide simple, brief information on some aspects of noise contro
34、l in workplaces; - to act as a guide to help in the understanding of requirements in stan- dards, directives, text books, manuals, reports and other specialized technical documents; iv STD-BSI BS EN IS0 Llb90-2-ENGL 1797 1b2Libb7 Ub35LbL Tb8 EN IS0 11690-2 : 1996 - to provide assistance in decision
35、making when assessing the various measures available. The IS0 11690 series should be useful to persons such as plant person- nel, health and safety officers, engineers, managers, staff in planning and purchasing departments, architects and suppliers of plants, machines and equipment. However, the ab
36、ove-mentioned parties should keep in mind that adherence to the recommendations of the IS0 11690 series is not all that is necessary to create a safe workplace. The effects of noise on health, well-being and human activity are many. By giving guidelines for noise control strategies and measures, the
37、 IS0 11690 series aims at a reduction of the impact of noise on human beings at workplaces. Assessment of the impact of noise on human beings is dealt with in other documents. V STD-BSI BS EN IS0 LLbSO-2-ENGL 1997 Lb24bb9 Ob35Lb2 7T9 D EN IS0 11690-2 : 1996 Acoustics - Recommended practice for the d
38、esign of low-noise workplaces containing machinery - Part 2: Noise control measures 1 scope This pari of IS0 11690 deals with the technical aspects of noise control in workplaces. The various technical measures are stated, the related acoustical quantities described, the magnitude of noise reduction
39、 discussed and the verification methods outlined. This pari of IS0 11690 deals only with audible sound. NOTE 1 Annex K lists relevant Intemational Standards and other literature on noise control measures. - - i = - - = * v1 * 2 Normative reference The following standard contains provisions which, th
40、rough reference in this text, constitute provisions of this pari of IS0 11690. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this pari of IS0 11690 are encouraged to investigate the possibility of applying the m
41、ost recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid Intemational Stan- dards. IS0 1 1690-1 :1996, Acoustics - Recommended prac- tice for the design of low-noise workplaces containing machinery - Part 1: Noise control strategies. 3 Defini
42、tions For the purposes of this part of IS0 11690, the defini- tions given in IS0 11690-1 apply. 4 Technical aspects of noise control Noise reduction measures can be applied at source (emission), between the source and the receiver (transmission path), and at the work station (receiver). (See figure
43、1 .) When dealing with the noise emission of a machine, an installation or a production process, etc., all possible noise reduction measures should be considered (see clause 5 and IS0 11690-1). To determine whether noise emission is as low as reasonably practicable, it is necessaty to consider noise
44、 emission quantities; these are given in the noise emission declaration (see IS0 11690-1:1996, clause 8) or determined by meas- urements (carried out in compliance with the relevant standard). An assessment of noise control devices such as en- closures, partial enclosures, barriers and screens, si-
45、lencers, etc. can be carried out by using, for example, the insertion loss data (see 6.2). The acoustic qualiy of workrooms and buildings is as- sessed with reference to the sound insulation regard- ing airborne and structure-borne sound (see 6.4), and that of workrooms with reference to sound propa
46、gation parameters (see 6.3). 1 EN IS0 11690-2 : 1996 - Transmission path Noise source Receiving point (work station) 1 Increase of transmission Reduction of noise immission Reduction of noise emission Loss/insertion Loss and noise exposure (Primary noise control) (Secondary noise control) Figure 1 -
47、 Basic aspects of noise control The overall effectiveness of noise control measures is determined from the noise immission values at the work stations. Generally, people located at a work station or in the vicinity of a machine are affected by the direct noise emitted by the machine. Therefore, to r
48、educe noise in the workplace, the most effective solution is to reduce noise at source (primary measures). Additional meas- ures on the transmission paths (secondary measures) may be impractical because they hinder the work task and the production process. When assessing the state of noise reduction
49、 technology, low noise emission of sound sources is therefore given high priori with re- gard to occupational safety. The basic aspects of noise control (see also IS0 11690-1) are illustrated in figure 1. These are reviewed in clauses 5 to 7. In order to minimize noise at the workplace, all noise control measures should be considered a prion (see figure 2). Noise control is most effective if it is carried out when planning, modifying, changing existing machinery or equipment, or when acquiring new machinery or equipment in plants, workrooms and buildings
