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1、BRITISH STANDARD BS EN ISO 11690-2:1997 Acoustics Recommended practice for the design of low-noise workplaces containing machinery Part 2: Noise control measures The European Standard EN ISO 11690-2:1996 has the status of a British Standard ICS 13.140; 17.140.20 Licensed Copy: sheffieldun sheffieldu
2、n, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11690-2:1997 This British Standard, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1997 BSI 0
3、9-1999 ISBN 0 580 27285 0 National foreword This British Standard is the English language version of EN ISO 11690-2:1996. It is identical with ISO 11690-2:1996. The UK participation in its preparation was entrusted by Technical Committee EH/1, Acoustics, to Subcommittee EH/1/4, Machinery noise, whic
4、h has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them
5、 in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that Annex ZA lists normative references to international publications with their corresponding European publications. The British Standar
6、ds which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to includ
7、e all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. 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, pages i
8、 and ii, the EN ISO title, page 2, the ISO title page, pages ii to iv, pages 1 to 20, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendmen
9、ts issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11690-2:1997 BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Forewordiii Text of ISO 11690-21 Licensed Copy:
10、sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11690-2 November 1996 ICS 13.140 De
11、scriptors: See ISO document English version Acoustics Recommended practice for the design of low-noise workplaces containing machinery Part 2: Noise control measures (ISO 11690-2:1996) Acoustique Pratique recommande pour la conception de lieux de travail bruit rduit contenant des machines Partie 2:
12、Moyens de rduction du bruit (ISO 11690-2:1996) Akustik Richtlinien fr die Gestaltung lrmarmer maschinenbestckter Arbeitssttten Teil 2: Lrmminderungsmanahmen (ISO 11690-2:1996) This European Standard was approved by CEN on 1996-10-16. CEN members are bound to comply with the CEN/CENELEC Internal Regu
13、lations 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 the Central Secretariat or to any CEN member. The Eu
14、ropean Standards exist 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 Central Secretariat has the same status as the official versions. CEN members are the na
15、tional standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr
16、Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN ISO 11690-2:1996 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11690-2:1996 BSI 09-1999 2 Foreword The text of the
17、 International Standard ISO 11690-2:1996 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 DS. This European Standard shall be given the status of a national standard, either by publica
18、tion 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to i
19、mplement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 11690-2:1996 was approved
20、 by CEN as a European Standard without any modification. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11690-2:1996 ii BSI 09
21、-1999 Contents Page Forewordiii Introduction1 1Scope1 2Normative reference1 3Definitions1 4Technical aspects of noise control1 5Noise control at source2 6Noise control on the transmission path7 7Noise control at the work station8 8Verification methods8 9New technologies10 Annex A (informative) Modif
22、ication or replacement of machine components11 Annex B (informative) Arrangement of sound sources11 Annex C (informative) Enclosures12 Annex D (informative) Silencers14 Annex E (informative) Noise barriers and screens in rooms14 Annex F (informative) Acoustical treatment of surfaces14 Annex G (infor
23、mative) Structure-borne sound insulation15 Annex H (informative) Airborne sound insulation of partitions16 Annex I (informative) Noise control at the work station16 Annex J (informative) Example of a new technology17 Annex K (informative) Bibliography18 Annex ZA (normative) Normative references to i
24、nternational publications with their relevant European publicationsInside back cover Figure 1 Basic aspects of noise control2 Figure 2 Steps for the implementation of noise control measures3 Figure 3 Generation process of mechanical noise3 Figure 4 Example of sound pressure level during hammering5 F
25、igure 5 Example of sound pressure level when grinding during the cleaning of a cast iron electromotor housing6 Figure 6 Example of sound pressure level when hammering6 Figure 7 Example of sound pressure level when grinding a steel plate7 Figure 8 Typical spatial sound distribution curve for a room w
26、ith diffuse field conditions, without and with several surface treatments9 Figure 9 Typical spatial sound distribution curve for a fitted room without diffuse field conditions, with and without sound-absorbing ceiling10 Figure C.1 Typical noise reduction achieved for different machine and enclosure
27、configurations13 Figure J.1 Cancellation mechanism17 Figure J.2 Limit of application17 Table 1 Examples of alternative processes with lower noise5 Table 2 Typical values for the average sound absorption coefficient () and sound propagation descriptors DLf and DL2 in the middle region8 Table F.1 Mean
28、 sound absorption coefficient () in the frequency range 500 Hz to 2 000 Hz for nearly cubic rooms without sound-absorbing treatment15 Descriptors: Acoustics, machinery, noise (sound), engine noise, noise reduction, workplaces, design, implementation. Licensed Copy: sheffieldun sheffieldun, na, Sat N
29、ov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11690-2:1996 BSI 09-1999iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried
30、 out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
31、 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires appro
32、val by at least 75 % of the member bodies casting a vote. International Standard ISO 11690-2 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. ISO 11690 consists of the following parts, under the general title Acoustics Recommended practice for the design of low-noi
33、se workplaces containing machinery: Part 1: Noise control strategies; Part 2: Noise control measures; 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 recomm
34、ended to start with part 1. Annex A to Annex K of this part of ISO 11690 are for information only. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncon
35、trolled Copy, (c) BSI EN ISO 11690-2:1996 BSI 09-19991 Introduction Most of the existing International Standards prepared in ISO/TC 43/SC 1 specify methods for measurement and/or evaluation of noise. The final objective of ISO 11690, however, is noise reduction. A number of noise control measures ar
36、e offered. However, in order to be effective, the most appropriate noise control measure(s) 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 chara
37、cteristics and to understand the basic principles of noise control. To assist in the development of noise control in the workplace, it is essential that the information contained in these recommended practices is disseminated through International Standards. In order to reduce noise as a hazard in t
38、he workplace, individual countries have produced national 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 exposure, taking into account: known available m
39、easures; the state of the art regarding technical progress; the treatment of noise at source; appropriate planning, procurement and installation of machines and equipment. This part of ISO 11690, together with the two other parts in the series, outlines procedures to be considered when dealing with
40、noise control at workplaces, within workrooms and in the open. These recommended practices 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 noi
41、se control requirements. The purpose of the ISO 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
42、 on some aspects of noise control in workplaces; to act as a guide to help in the understanding of requirements in standards, directives, text books, manuals, reports and other specialized technical documents; to provide assistance in decision making when assessing the various measures available. Th
43、e ISO 11690 series should be useful to persons such as plant personnel, health and safety officers, engineers, managers, staff in planning and purchasing departments, architects and suppliers of plants, machines and equipment. However, the above-mentioned parties should keep in mind that adherence t
44、o the recommendations of the ISO 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 ISO 11690 series aims at a reduction of the impact of noi
45、se on human beings at workplaces. Assessment of the impact of noise on human beings is dealt with in other documents. 1 Scope This part of ISO 11690 deals with the technical aspects of noise control in workplaces. The various technical measures are stated, the related acoustical quantities described
46、, the magnitude of noise reduction discussed and the verification methods outlined. This part of ISO 11690 deals only with audible sound. NOTE 1Annex K lists relevant International Standards and other literature on noise control measures. 2 Normative reference The following standard contains provisi
47、ons which, through reference in this text, constitute provisions of this part of ISO 11690. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 11690 are encouraged to investigate the possibility of a
48、pplying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 11690-1:1996, Acoustics Recommended practice for the design of low-noise workplaces containing machinery Part 1: Noise control strategies. 3 De
49、finitions For the purposes of this part of ISO 11690, the definitions given in ISO 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 1.) Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 02:00:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11690-2:1996 2 BSI 09-1999 When dealing with the noise emission of