1、BRITISH STANDARD CONFIRMED SEPTEMBER1992 BS6805-2: 1987 ISO7574-2: 1985 EN27574-2: 1988 Incorporating Amendment No.1 Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part2: Method for determining and verifying stated values for individual mach
2、ines ISO title: Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part2: Methods for stated values for individual machines UDC534.6:534.835.46:519.22BS6805-2:1987 This British Standard, having been prepared under the directionof the E
3、nvironment andPollution Standards Committee, was published underthe authority of the BoardofBSI and comes intoeffecton 30 January1987 BSI11-1999 The following BSI references relate to the work on this standard: Committee reference EPC/1 Draft for comment 84/52395DC ISBN 0 580 15555 2 Committees resp
4、onsible for this British Standard The preparation of this British Standard was entrusted by the Environment and Pollution Standards Committee (EPC/-) to Technical Committee EPC/1, upon which the following bodies were represented: Association of Consulting Engineers Incorporated Association of Archit
5、ects and British Broadcasting Corporation Surveyors British Occupational Hygiene Society Institute of Acoustics British Telecommunications plc Institute of Occupational Hygienists Department of Health and Social Security Institute of Physics Department of the Environment Institute of Sound and Vibra
6、tion Research (Building Research Establishment) Institution of Civil Engineers Department of Trade and Industry Institution of Electronic and Radio Engineers (Air Division) Petroleum Industry Association Department of Trade and Industry Royal Institute of British Architects (National Physical Labora
7、tory) Society of Environmental Engineers Engineering Equipment and Materials Users Transmission and Distribution Association Association (BEAMA Limited) Health and Safety Executive The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Advanced
8、Manufacturing Technology Research Cement Makers Federation Institute Department of Trade and Industry Agricultural Engineers Association (National Engineering Laboratory) British Compressed Air Society Hevac Association British Engine Group of the Society of Motor Institution of Mechanical Engineers
9、 Manufacturers and Traders Institution of Production Engineers British Steel Corporation Rotating Electrical Machines Association Business Equipment Trade Association (BEAMA Ltd.) Amendments issued since publication Amd. No. Date of issue Comments 6299 April1990 Indicated by a sideline in the margin
10、BS6805-2:1987 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Brief history 2 Text of EN27574-2 3 Publications referred to Inside back coverBS6805-2:1987 ii BSI 11-1999 National foreword This Part of BS6805 has been prepared under the direction of the Envir
11、onment and Pollution Standards Committee and is identical with ISO7574-2:1985 “Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part2: Methods for stated values for individual machines”. The standard was prepared by subcommittee1, No
12、ise, of Technical Committee43, Acoustics, of the International Organization for Standardization (ISO) with the active participation and approval of the UK. In1988 the European Committee for Standardization (CEN) accepted ISO7574-2:1985 as European Standard EN27574-2:1988 BS6805 at present comprises
13、the following Parts. Part1: Glossary of terms; Part2: Method for determining and verifying stated values for individual machines; Part3: Method for determining and verifying stated values for batches of machines using a simple (transition) method; Part4: Methods for determining and verifying stated
14、values for batches of machines. Further Parts of BS6805 will be prepared, if required. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical
15、 with those used in British Standards; attention is drawn especially to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “ISO7574” or “part of ISO7574” appe
16、ar, referring to this standard, they should be read as “BS6805” or “Part of BS6805” respectively. Cross-references International Standard Corresponding British Standard ISO3741:1975 BS4196 Sound power levels of noise sources Part1:1981 Precision methods for determination of sound power levels for br
17、oad-band sources in reverberation rooms (Identical) ISO3742:1975 Part2:1981 Precision methods for determination of sound power levels for discrete-frequency and narrow-band sources in reverberation rooms (Identical) ISO3743:1976 Part3:1981 Engineering methods for determination of sound power levels
18、for sources in special reverberation test rooms (Identical) ISO3744:1981 Part4:1981 Engineering methods for determination of sound power levels for sources in free-field conditions over a reflecting plane (Identical) ISO3745:1977 Part5:1981 Precision methods for determination of sound power levels f
19、or sources in anechoic and semi-anechoic rooms (Identical)BS6805-2:1987 BSI 11-1999 iii The Technical Committee has reviewed the provisions of ISO4871, to which reference is made in the text and has decided that they are acceptable for use in conjunction with this standard. A British Standard does n
20、ot 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. International Standard Corresponding British Standard ISO3746:1979
21、 Part6:1981 Survey method for determination of sound power levels of noise sources (Identical) BS6805 Statistical methods for determining and verifying stated noise emission values of machinery and equipment ISO7574-1:1985 Part1:1987 Glossary of terms (Identical) ISO7574-4:1985 Part4:1987 Methods fo
22、r determining and verifying stated values for batches of machines (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, the EN title page, pages2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may
23、have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN27574-2 December1988 UDC534.6:534.835.46:519.22 Key words: Acoustics, noise: sound, engine noise, statistical quality control, statist
24、ical analysis English version Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part2: Methods for stated values for individual machines (ISO7574-2, edition1985) Acoustique; Mthodes statistiques pour la dtermination et le contrle des
25、valeurs dclares dmission acoustique des machines et quipements Partie2: Mthodes pour valeurs dclares de machines individuelles (ISO7574-2, dition1985) Akustik; Statistische Verfahren zur Festlegung und Nachprfung angegebener (oder vorgegebener) Geruschemissionswerte von Maschinen und Gerter Teil2: V
26、erfahren fr Angaben (oder Vorgaben) fr Einzelmaschinen (ISO7574-2, Ausgabe1985) This European Standard was accepted by CEN on15 November1988. CEN members are bound to comply with the requirements of the CEN/CENELEC Rules which stipulate the conditions for giving this European Standard the status of
27、a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Central Secretariat or to any CEN member. This European Standard exists in the official versions (English, French, German). A versi
28、on in any other language made by translation under the responsibility of a CEN member into its own language and notified to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, German
29、y, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN1988 Copyr
30、ight reserved to all CEN members Ref. No. EN27574-2:1988EEN27574-2:1988 BSI 11-1999 2 Brief history The Technical Board decided with Resolution BT84/1988 to submit the International Standard ISO7574-2:1985, Acoustics; Statistical methods for determining and verifying stated noise emission values of
31、machinery and equipment Part2:Methods for stated values for individual machines. to the Formal Vote. Since this standard passed the Formal Vote positively without modification, it was approved by CEN as European Standard EN27574-2. In accordance with the Common CEN/CENELEC Rules, the following count
32、ries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Statement The text of the International Standard ISO7574-2, edition1985 w
33、as approved by CEN as a European Standard without any modification. Contents Page Brief history 2 0 Introduction 3 1 Scope and field of application 3 2 References 3 3 Definitions 3 4 General 3 5 Guidelines for the determination of the labelled value, L c , by the labeller 3 6 Verifying the labelled
34、value for an individual machine 4 7 Information to be given 4EN 27574-2:1988 BSI 11-1999 3 0 Introduction A general introduction to the four-part series of ISO7574 is given in ISO7574-1. For the purposes of this part of ISO7574, the term “labelled value” stands for all kinds of stated values (e.g.in
35、formation on a label, the upper noise limit set by an authority, the agreed contract value) for which the methods may be applied. The methods described in this part of ISO7574 are of a statistical nature only in a restricted sense. Statistical view-points are relevant mainly when estimating the valu
36、e of K (seeclause5). 1 Scope and field of application This part of ISO7574 provides guidelines for determining the labelled values of the noise emissions of individually-labelled machinery and equipment, that is, in the situation in which each machine produced has its own individually-labelled value
37、 of its noise emission quantity. It also specifies a method for verifying compliance of the noise emission of an individual machine or item of equipment with its labelled value. This part of ISO7574 does not deal with the consequences that ensue if the stated value is not confirmed as verified for a
38、 single machine. 2 References ISO3741, Acoustics Determination of sound power levels of noise sources Precision methods for broad-band sources in reverberation rooms. ISO3742, Acoustics Determination of sound power levels of noise sources Precision methods for discrete-frequency and narrow-band sour
39、ces in reverberation rooms. ISO3743, Acoustics Determination of sound power levels of noise sources Engineering methods for special reverberation test rooms. ISO3744, Acoustics Determination of sound power levels of noise sources Engineering methods for free-field conditions over a reflecting plane.
40、 ISO3745, Acoustics Determination of sound power levels of noise sources Precision methods for anechoic and semi-anechoic rooms. ISO3746, Acoustics Determination of sound power levels of noise sources Survey method. ISO4871, Acoustics Noise labelling of machinery and equipment. ISO7574-1, Acoustics
41、Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part1: General considerations and definitions. ISO7574-4, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part4: Methods for s
42、tated values for batches of machines. 3 Definitions For the purposes of this part of ISO7574, the definitions given in ISO7574-1 apply. 4 General When checking compliance of a machine with its individually-labelled value, this part of ISO7574 works on the principle that the labelled value indicates
43、the limit below which the noise emission value of the machine lies. NOTEIn the application of this part of ISO7574, it is assumed that all measurements will be performed by a testing laboratory which has appropriate test facilities and trained staff. 5 Guidelines for the determination of the labelle
44、d value, L c , by the labeller As the determination of the labelled value is the sole responsibility of the labeller, this clause is given for guidance only. The measured value (or the mean of several measured values) for the individual machine is designated L *and shall be determined in accordance
45、with the specific measurement test code for the specific family of machines. (The asterisk in the symbol is used here to differentiate between measurements in conformity with this clause and those in conformity with clause6.) NOTE 1If such a specific measurement test code does not exist, the methods
46、 specified in ISO3741, ISO3742, ISO3743, ISO3744 and ISO3745 1)may be used if the installation and operating conditions typical for normal use are clearly stated or agreed. NOTE 2If the specific measurement test code for the family of machines provides more than one mode of operation in normal use,
47、the mode yielding the highest value of L *or the mode agreed upon in the relevant machinery industry or in the contract should be used to determine L c . The installation and operating conditions and the measurement test code used should be clearly stated. The labelled value, L c , for the machine m
48、ay be determined by L c W L * + K 1) This does not preclude the use of other International Standards, e.g.ISO3746, which may form the basis of the special measurement test code.EN 27574-2:1988 4 BSI 11-1999 The value of K in the above equation shall be chosen to account for the random measurement er
49、rors occurring under reproducibility conditions (see3.17 of ISO7574-1). An appropriate value may be determined by multiplying the standard deviation of reproducibility, R , by the quantile, , for the desired probability of acceptance, P a , from Table7 in ISO7574-4. A value of K=3dB is appropriate in many cases (=1,645 for P a =95%; R =1,8dB) and is given for guidance. NOTEIf the stated value is only relevant for one contract, for example, and is (according to this contract) to be verified in the testing laborator
