BS-EN-ISO-4871-1997.pdf

BRITISH STANDARD BS EN ISO 4871:1997 Acoustics Declaration and verification of noise emission values of machinery and equipment The European Standard EN ISO 4871:1996 has the status of a British Standard ICS 17.140.20 BS EN ISO 4871:1997 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 August 1997 © BSI 09-1999 ISBN 0 580 28070 5 National foreword This British Standard is the English language version of EN ISO 4871:1996. It is identical with ISO 4871:1996. 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; 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 in the UK. A list of organizations represented on this committee can 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 or European publications. The British Standards 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 include 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 and ii, the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 to 12, 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. Amendments issued since publication Amd. No.DateComments BS EN ISO 4871:1997 © BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Forewordiii Text of ISO 48711 ii blank EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 4871 December 1996 ICS 17.140.20 Descriptors: See ISO document English version Acoustics Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996) Acoustique Déclaration et vérification des valeurs démission sonore des machines et équipements (ISO 4871:1996) Akustik Angabe und Nachprüfung von Geräuschemissionswerten yon Maschinen und Geräten (ISO 4871:1996) This European Standard was approved by CEN on 1996-09-27. CEN members 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 application to the Central Secretariat or to any CEN member. The European 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 national 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 Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1996 Copyright reserved to CEN members Ref. No. EN ISO 4871:1996 E EN ISO 4871:1996 © BSI 09-1999 2 Foreword The text of the International Standard ISO 4871:1996 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 publication of an identical text or by endorsement, at the latest by June 1997, and conflicting national standards shall be withdrawn at the latest by June 1997 This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. ISO 4871 deals with clause 1.7.4 f) of Annex A of EN 292-2, requiring that manufacturers must give information on the airborne noise emission by machinery. The correspondence between the physical quantities used in the above-mentioned clause and in ISO 4871 is given hereafter. The equivalent continuous A-weighted sound pressure level at workstations stated in that clause corresponds to the “measured A-weighted emission sound pressure level at specified positions” in ISO 4871. The peak C-weighted instantaneous pressure value at workstations stated in that clause corresponds to the “measured C-weighted peak emission sound pressure level at specified positions” in ISO 4871. The sound power level emitted by the machinery stated in that clause corresponds to the “measured sound power level” in ISO 4871. According to the CEN/CENELEC 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, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 4871:1996 was approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZB (normative). EN ISO 4871:1996 ii © BSI 09-1999 Contents Page Forewordiii Introduction1 1Scope1 2Normative references2 3Definitions3 4Noise emission declarations5 5Presentation of noise emission declarations5 6Verification of noise emission declarations6 Annex A (informative) Guidelines for declaration of the noise emission of machinery and equipment8 Annex B (informative) Examples of noise emission declarations for machinery and equipment10 Annex C (informative) Verification of the declared noise emission value for a batch of machines11 Annex D (informative) Bibliography11 Annex ZA (informative) Clauses of this European standard essential requirements or other provisions of EU Directives12 Annex ZB (normative) Normative references to international publications with their relevant European publicationsInside back cover Table A.110 Descriptors: Acoustics, machinery, noise (sound), labelling. EN ISO 4871:1996 © 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 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 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 approval by at least 75 % of the member bodies casting a vote. International Standard ISO 4871 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. This second edition cancels and replaces the first edition (ISO 4871:1984), which has been technically revised. Annex A, Annex B, Annex C and Annex D of this International Standard are for information only. iv blank EN ISO 4871:1996 © BSI 09-19991 Introduction Information on the acoustic noise emitted by machinery and equipment is needed by users, planners, manufacturers and authorities. This information is required for comparing the noise emitted by different products, for assessing noise emissions against noise limits, for planning workplace noise levels, as well as for checking noise reduction achievements, and may be used for estimating requirements for workplace noise immission. In order for machinery noise emission data to be useful, uniform methods of measurement and declaration are necessary to achieve the following purposes. a) Measurement of noise emission The ISO 3740 series specifies methods for determining the sound power levels of noise sources from sound pressure level measurements; the ISO 9614 series specifies methods for determining the sound power levels from sound intensity level measurements; the ISO 11200 series describes methods for determining emission sound pressure levels at specified positions in the vicinity of machinery and equipment. Many other standards give test codes for the measurement of the noise emissions of individual types of machinery which are based on these methods. b) Determination of the noise emission value to be declared The ISO 7574 series gives methods for determining declared noise emission values which are based primarily on the sound power levels of noise sources. For a complete presentation of declared noise emission values, it is necessary to state the sound pressure levels at specified positions as well as the sound power level. Because of the possible confusion in terminology with respect to sound pressure levels used to define noise immission, the term “emission sound pressure level” is used in this International Standard. c) Presentation of declared noise emission values It is of prime importance to declare sound power levels. It is recognized, however, that information on emission sound pressure levels is sometimes required. It is recommended, therefore, that both kinds of quantity be declared, unless otherwise specified. Noise emission declarations can take the form of either a single-number or dual-number presentation; the choice is made in the noise test code appropriate to the particular family. d) Verification of declared noise emission values The ISO 7574 series gives procedures for the verification of a declared noise emission value. In that International Standard, the procedures are applied to verification of declared sound power levels. The procedures of this International Standard are applied to the verification of both sound power levels and emission sound pressure levels. The information in this International Standard on the verification of declared noise emission values may be used both by a buyer of equipment to compare the relative noise levels of various products, and by a manufacturer as part of a statistical quality control programme. Requirements on the declaration of noise emission values are given in clause 4. As the declaration of noise emission of machinery and equipment is the responsibility solely of the manufacturer or supplier, guidelines concerning the declaration are found in Annex A. Requirements on the presentation of declared noise emission values are given in clause 5 and Annex B, and those on verification are given in clause 6 and Annex C. 1 Scope This International Standard gives information on the declaration of noise emission values, describes acoustical and product information to be presented in technical documents for the purposes of noise emission declaration, and specifies a method for verifying the noise emission declaration. It is applicable to machinery and equipment. The values to be used for the purposes of noise emission declaration are either declared single-number noise emission values, Ld, or declared dual-number noise emission values, L and K, L is a noise emission value determined directly from measurements and K is the uncertainty associated with those measurements. Ld is the sum of L and K and represents an upper limit which values from repeated measurements are unlikely to exceed at a given confidence level; Ld corresponds to the stated or labelled value, Lc, defined in ISO 7574-1. EN ISO 4871:1996 2 © BSI 09-1999 The two forms of noise declaration are alternative means of representing any or all of the A-weighted sound power level, LWA, the A-weighted emission sound pressure level at specified positions, LpA, and the C-weighted peak emission sound pressure level at specified positions, LpC,peak. The choice as to which of the two forms is used in a particular case depends upon the requirements to be fulfilled. This selection is made, and guidance on the values of K is given, in the appropriate noise test code. Guidelines for determining declared noise emission values are given in Annex A. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3740:1980, Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards and for the preparation of noise test codes. ISO 3741:, Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for reverberation rooms1). ISO 3743-1:1994, Acoustics Determination of sound power levels of noise sources Engineering methods for small, movable sources in reverberant fields Part 1: Comparison method for hard-walled test rooms. ISO 3743-2:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Methods for special reverberation test rooms. ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over a reflecting plane. ISO 3745:1977, Acoustics Determination of sound power levels of noise sources Precision methods for anechoic and semi-anechoic rooms. ISO 3746:1995, Acoustics Determination of sound power levels of noise sources using sound