1、BRITISH STANDARD BS EN ISO 11690-3:1999 Acoustics Recommended practice for the design of low-noise workplaces containing machinery Part3: Sound propagation and noise prediction in workrooms The European Standard EN ISO11690-3:1997 has the status of a BritishStandard ICS13.140; 17.140.20BS EN ISO 116
2、90-3:1999 This British Standard, having been prepared under the directionof the Health and Environment Sector Committee, was published under the authorityof the Standards Committee and comes into effect on 15 January 1999 BSI 04-1999 ISBN 0 580 29831 0 National foreword This British Standard is the
3、English language version of ENISO11690-3:1998. It is identical with ISO/TR11690-3:1997. The UK participation in its preparation was entrusted by Technical Committee EH/1, Acoustics, to Subcommittee EH/1/4, Machinery noise, which has the responsibility to: aid enquirers to understand the text; presen
4、t 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 in the UK. A list of organizations represented on this subcommittee can
5、be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement inter
6、national or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to incl
7、ude 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
8、 i and ii, theENISOtitlepage, page2, the ISO/TR title page, pagesii toiv, pages1to22 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. Amendments issued since public
9、ation Amd. No. Date CommentsBS EN ISO 11690-3:1999 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Foreword iv Text of ISO/TR11690-3 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO11690-3 November1998 ICS Descriptors: See ISO document English version Aco
10、ustics Recommended practice for the design of low-noise workplaces containing machinery Part3: Sound propagation and noise prediction in workrooms (ISO/TR11690-3:1997) Acoustique Pratique recommande pour la conception de locaux de travail bruit rduit contenant des machines Partie3:Propagation du son
11、 et prvision du bruit dans les locaux de travail (ISO/TR11690-3:1997) Akustik Richtlinien fr die Gestaltung lrmarmer maschinenbestckter Arbeitssttten Teil3: Schallausbreitung und-vorausberechnung in Arbeitsrumen (ISO/TR11690-3:1997) This European Standard was approved by CEN on 9 January 1998. CEN m
12、embers 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 bibliographical references concerning such national standards may be obtained on applic
13、ation to the Central Secretariat 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 Central Secretariat has th
14、e same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committ
15、ee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO11690-3:1998EENISO 11690-3:1998 B
16、SI 04-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC43 “Acoustics” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC211 “Acoustics”, the secretariat of which is held by DS. Thi
17、s 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 May1999, and conflicting national standards shall be withdrawn at the latest by May1999. According to the CEN/CENELEC Internal Regulations, the nationa
18、l standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Warni
19、ng This document was published as a European Standard to provide a harmonized base for national standards. It is a guidance document which means that it cannot be used for type-approval purposes. The guidance contained in this standard is not intended to be exhaustive, but to highlight important asp
20、ects to which attention should be given. Endorsement notice The text of the International Standard ISO/TR11690-3:1997 has been approved by CEN as a European Standard without any modification.ENISO 11690-3:1998 ii BSI 04-1999 Contents Page Foreword iv Introduction 1 1 Scope 1 2 References 1 3 Definit
21、ions 1 4 Basic principles of sound propagation in rooms 1 5 Noise prediction in workrooms 4 6 Methodology for noise prediction in workrooms 4 7 Further aspects of noise prediction 7 Annex A Three case studies relating to noise prediction in workrooms 9 Annex B Prediction of the noise impact of new m
22、achines in existing workrooms 15 Annex C Determination of the sound pressure level at theworkstationofamachine in a workroom 18 Annex D Evaluation of the acoustical quality of a workroom 20 Annex E Recommendation for the use of noise prediction methods 21 Annex F Bibliography 22 Figure 1 Examples of
23、 spatial sound distribution curves for anomnidirectionalpoint source and two rooms with different sizes,equalabsorption coefficients and diffuse field. The dotted curveisthespatial sound distribution curve under total freefieldconditions.L p denotes the sound pressure level at a givenpointwhenthe so
24、und power level of the source is100dB 2 Figure 2 Examples of typical spatial sound distribution curvesforthesameflatand fitted room, with and without soundabsorbingceiling. The dotted curve is the spatial sound distributioncurveunder total free field conditions. L pdenotes thesoundpressurelevel at a
25、 given point when the sound power levelofthesourceis100dB 3 Figure 3 General flow chart for noise prediction in workrooms 8 Figure A.1 Location of machines and workstations in the workroom 10 Figure A.2 Calculated spatial sound distribution curve 11 Figure A.3 Location of machines and workstations i
26、n the workroom 12 Figure A.4 Calculated spatial sound distribution curve 13 Figure A.5 Sketch of the workroom and location of machines and workstations 14 Figure A.6 Calculated spatial sound distribution curves 15 Figure B.1 Location of machines and workstations in the workroom 16 Figure B.2 Calcula
27、ted spatial sound distribution curve 17 Figure C.1 Diagram for the determination of the sound pressure levelincreaseat the workstation of a machine 19 Figure D.1 Calculated spatial sound distribution curves 21 Table 1 Absorption and shape of the room 4 Table 2 Room fittings 5 Table 3 Sources 5 Table
28、 4 Categories of prediction methods 5 Table A.1 Level of detail of input parameters 9 Table A.2 Room shape and dimensions 10 Table A.3 Absorption of the room 10 Table A.4 Source data 10 Table A.5 Workstation data 10 Table A.6 Workstation noise data 11ENISO 11690-3:1998 BSI 04-1999 iii Page Table A.7
29、 Level of detail of input parameters 11 Table A.8 Room shape and dimensions 12 Table A.9 Absorption of the room 12 Table A.10 Room fittings 12 Table A.11 Source data 12 Table A.12 Workstation data 12 Table A.13 Calculated immission sound pressure level at the workstation 13 Table A.14 Level of detai
30、l of input parameters 13 Table A.15 Absorption of the room 14 Table A.16 Room fittings 14 Table A.17 Source data 14 Table A.18 Workstation data 14 Table A.19 Calculated immission sound pressure levels L pat workstations 15 Table B.1 Level of detail of input parameters 15 Table B.2 Room shape and dim
31、ension 16 Table B.3 Absorption of the room 16 Table B.4 Source data 17 Table B.5 Workstation data 18 Table B.6 Calculated immission sound pressure levels at workstations 18 Table B.7 Source data 18 Table B.8 Workstation data 18 Table B.9 Calculated immission sound pressure levels, L pindB, atworksta
32、tions 18 Table C.1 Source data 19 Table C.2 Sound pressure level determination 20 Table D.1 Level of detail of input parameters 20 Table D.2 Shape and dimensions 20 Table D.3 Absorption of the room 20 Table D.4 Calculated values of excess of sound pressure level, DLf,andsoundpressure decay per dista
33、nce doubling, DL2 21 Table E.1 Recommended range of levels of detail of input parametersforeachcategory of noise prediction method 21 Descriptors: Acoustics, machinery, noise (sound), engine noise, noise reduction, workplaces, workroom, design, sound transmission, rules of calculation.ENISO 11690-3:
34、1998 iv BSI 04-1999 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 out through ISO technical committees. Each member body interested in a s
35、ubject 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 collaborates closely with the International Electrotechnical Commission
36、(IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards, but in exceptional circumstances a technical committee may propose the publication of a Technical Report of one of the following types: type1, when the required supp
37、ort cannot be obtained for the publication of an International Standard, despite repeated efforts; type2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; type3, when a
38、technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art”, for example). Technical Reports of types1 and2 are subject to review within three years of publication, to decice whether they can be transformed into In
39、ternational Standards. Technical Reports of type3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. ISO/TR11690-3, which is a Technical Report of type3, was prepared by Technical Committee ISO/TC43, Acoustics, Subcommittee SC1, Noise.
40、ISO11690 consists of the following parts, under the general title Acoustics Recommended practice for the design of low-noise workplaces containing machinery: Part1: Noise control strategies; Part2: Noise control measures; Part3: Sound propagation and noise prediction in workrooms.ENISO11690-3:1998 B
41、SI 04-1999 1 Introduction This Technical Report is intended for use by all parties involved in noise reduction in workplaces and design of low-noise workplaces. The objective is: to make them aware of what is the current technical consensus regarding sound propagation and noise prediction in workroo
42、ms, to aid the interaction between them within a common technical framework, to promote the understanding of the desired noise control requirements. This Technical Report provides the connection between the emission of sound sources e.g.machines and the sound pressure level at workstations caused by
43、 their operation in a workroom. Therefore, it allows an interchange of information between machine suppliers, who are responsible for noise emission values, and machine users, who require low noise immission values. A further target is the assessment of the acoustical performance of a workroom. Thes
44、e tasks are connected by the determination of the sound propagation descriptors of a workroom. A methodology for noise prediction in workrooms is presented and a structure is given for the classification of prediction methods according to the level of detail of input parameters. 1 Scope In this part
45、 of ISO11690, sound propagation in a room is considered together with the prediction of sound pressure levels and of noise immission at the workplace. Details of the description of the physical phenomena involved in a noise prediction scheme are strongly dependent on the situation being considered a
46、nd the way this situation is modelled (input parameters, calculation techniques). This dependency is surveyed and the methodology for noise prediction is described. Recommendations are provided concerning the use of noise prediction as an aid for noise control in workrooms. Examples of use of noise
47、prediction methods are given in Annex A to Annex E. 2 References References listed in ISO11690-1 should also be consulted when using this Technical Report. 3 Definitions Definitions given in ISO11690-1 apply to this Technical Report. 4 Basic principles of sound propagation in rooms 4.1 Sound propaga
48、tion descriptors A basic element for noise prediction in workrooms is the prediction of the distribution of sound pressure levels caused by an omnidirectional point source. This distribution is influenced by: the shape and the volume of the room, the absorption of the surfaces, the fittings. The res
49、ulting sound level distribution can be considered using a spatial sound distribution curve (see definition3.4.11 of part1 and Figure 1 and Figure 2 of this Technical Report). The information contained in this curve can be summarized, for a given distance range, by two quantities (seedefinitions3.4.12 and3.4.13 of part1): the rate of spatial decay of sound pressure level per distance doubling (DL2), the excess of
