1、UDC 534.61 : 534.835.46 : 620.1 DEUTSCHE NORM March 1989 Statistical methods for determining and verifying stated noise emission values of machinery and equipment Simplified method for stated values for batches of machines English version of DIN EN 27 574 Part 3 (IS0 7574-3 : 1985) DIN EN 27 574 Par
2、t 3 This standard incorporates the English version of Is0 7574-3. Akustik; statistische Verfahren zur Festlegung und Nachpr- fung angegebener (oder vorgegebener) Geruschemissions- werte von Maschinen und Gerten: einfaches Verfahren (bergangsregelung) fr Maschinenlose (IS0 7574-3 : 1985) European Sta
3、ndard EN 27 574-3 : 1989 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been published in accordance with a decision made by CEN/BT to adopt, without alteration, International Standard IS0 7574-3 :1985 as a European Standard. The responsi
4、ble German body involved in its preparation was the Normenausschu Akustik, Larmminderung und Schwingungstechnik (Acoustics, Noise Control and Vi bration Engineering Standards Committee). The DIN Standards corresponding to the International Standards and the IEC Publication referred to in clause 2 of
5、 the EN are as follows: IS0 Standard IS0 3534 IS0 3741, IS0 3742 IS0 3743 IS0 3744, IS0 3745, IS0 3746 IS0 3951 IS0 4871 IS0 5725 IS0 7574-1 IS0 7574-2 IS0 7574-3 IS0 7574-4 IEC 651 DIN Standard Conforms in substance with the DIN 55 350 series, particularly Parts 13 and 31. Conforms in substance wit
6、h DIN 45 635 Part 2. Conforms in substance with DIN 45 635 Part 3. Conforms in substance with DIN 45 635 Part 1, specifically, the basic measurement method for grade 1 accuracy is covered in IS0 3745, for grade 2 accuracy, in IS0 3744, and for grade 3 accuracy, in IS0 3746. Will be adopted as a DIN
7、IS0 Standard. Related in substance to DIN 45 649 Parts 1 and 2. DIN IS0 5725 DIN EN 27 574 Part 1 DIN EN 27 574 Part 2 DIN EN 27 574 Part 3 DIN EN 27 574 Part 4 DIN IEC 651 Continued overleaf. EN comprises 3 pages. Beuth Verlag 06.93 GmbH, Berlin. has the exclusiva right of sale for German Standards
8、 (DIN-Normen). DIN EN 27 574 Part 3 Engl. Price group 6 Sales No. 1106 Page 2 DIN EN 27 574 Part 3 Standards referred to (and not included in References) DIN 45 635 Part 1 Measurement of noise emitted by machines; airborne noise emission; enveloping surface method; basic method, divided into 3 grade
9、s of accuracy DIN 45 635 Part 2 Measurement of noise emitted by machines; airborne noise measurement; reverberation room method; basic measurement method (precision method, grade 1) DIN 45 635 Part 3 Measurement of noise emitted by machines; airborne noise measurement; special reverberation room met
10、hod: basic measurement method (precision method, grade 2) DIN 45 649 Part 1 Acoustics: verifiable noise emission levels of machinery; single values DIN 45 649 Part 2 Acoustics; verifiable noise emission levels of machinery in the form of splitted values DIN EN 27 574 Part 1 Acoustics: statistical me
11、thods for determining and verifying stated noise emission values of machinery and equipment; general considerations and definitions (IS0 7574-1 : 1985) DIN EN 27 574 Part 2 Acoustics; statistical methods for determining and verifying stated noise emission values of machinery and equipment; methods f
12、or stated values for individual machines (IS0 7574-2 : 1985) DIN EN 27 574 Part 4 Acoustics; statistical methods for determining and verifying stated noise emission values of machinery and equipment; methods for stated valuesfor batches of machines (IS0 7574-4 : 1985) DIN 55 350 series Terminology i
13、n quality assurance and statistics International Patent Classification G 10 K 11/16 G O1 N 29/00 EUROPEAN CTANDARD NORME EUROPENNE EN 27 574-3 EUROPAISCHE NORM Decem ber 1 988 UDC 534.61 : 534.835.46 : 620.1 Descriptors: Acoustics, noise, sound, engine noise, statistical quality control, statistical
14、 analysis. English version Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 3: Simple (transition) method for stated values for batches of machines (IS0 7574-3 : 1985) Acoustique; mthodes statistiques pour la dtermination et le
15、contrle des valeurs dclares dmission acou- stique des machines et quipements. Partie 3: Mthode simplifie (transitoire) pour valeurs dclares de lots de Akustik; statistische Verfahren zur Fest- legung und Nachprfung angegebener (oder vorgegebener) Geruschemissi- onswerte von Maschinen und Gerten. Tei
16、l 3: Einfaches Verfahren (bergangs- regelung) fr Maschinenlose machines (IS0 7574-3 : 1985) (IS0 7574-3 : 1985) This European Standard was approved by CEN on 1988-11-15 and is identical to the IS0 Standard as referred to. CEN members are bound to comply with the CENKENELEC Internal Regulations which
17、 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. This European Stand
18、ard exists in three official versions (English, French, German). Aversion 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 standa
19、rds 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 Normung Centr
20、al Secretariat: rue de Stassart 36,B-lOXI Brussels D 1988. Copyright reserved to all CEN members. Ref. No. EN 27 574-3 : 1988 E Page 2 EN 27 574-3 : 1988 Foreword In 1988, CEN/BT decided to submit International Standard IS0 7574-3 : 1985 Acoustics; statistical methods for determining and verifying s
21、tated noise emission values of machinery and equipment; simple (transition) method for stated values for batches of machines to Formal Vote. The result was positive. In accordance with the CENEENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria
22、, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard IS0 7574-3 : 1985 was approved by CEN as a European Standard without any
23、modification. O Introduction A general introduction to the four-part series of IS0 7574 is given in IS0 i“4/1. For the purposes of this part of IS0 7574, the term “labelled value“ stands for all kinds of stated values (e.g. information on a label, the upper noise limit set by an authority, the agree
24、d contract value) for which the methods may be applied. 1 Scope and field of application This part of IS0 7574 is derived from IS0 7574/4. It provides guidelines for determining the labelled value, L, by the labeller and specifies a simple method for verifying compliance of the noise emissions of a
25、batch (lot) of machinery or equipment with its labelled value, L,. The method may be used when a specific noise labelling code (in accordance with clause 6 of IS0 7574/4) specifying the reference standard deviation, sample size and sampling procedure for the family of machines does not yet exist. If
26、 a specific noise labelling code exists, it shall be used, in which case reference to this part of IS0 7574 shall not be made. This part of IS0 7574 should preferably be used only by agree- ment, e.g. as reached in the standards relating to the relevant machinery industry or in a contract. This part
27、 of IS0 7574 does not deal with the consequences that ensue if the stated value is not confirmed as verified for a batch of machines. 2 References IS0 3741, Acoustics - Determination of soundpower levels of noise sources - Recision methods for broad-band sources in reverberation rooms. IS0 3742, Aco
28、ustics - Determination of soundpower levels of noise sources - Prec, of the individual machines in a sample. The labelled value, L, of a batch of machines may be deter- mined by adding a constant, K, to the mean value of the sample, P: L,= + K in general, it is preferable to choose a sample size as
29、large as practicable in determinations of the mean value in order to reduce the uncertainties associated with the noise source. The constant, K, is a positive number, determined by the labeller on the basis of the definition of the labelled value (see clause 4) with respect to the verification proce
30、dure of clause 6. Ac- cording to clause 6, the value of K should be greater than or equal to 5 dB. This value is given for guidance only. More guidance is given in clause 5 of IS0 7574/4 assuming that DM = 3.5 dB. NOTE - Testing may be necessary from time to time in order to ensure that the labelled
31、 value continues to be correct. Testing is also required whenever physical changes are made to the production machines that may affect their noise emissions. 6 Verifying the labelled value for a batch of machines If no special noise labelling code exists for the specific family of machines to be ver
32、ified, verification of the labelled value, L, is then carried out as follows : a) A sample size of n = 3 is taken at random from the batch under consideration. b) The measured values, Li, are determined in accordance with the specific measurement test code for the specific family of machines, or, if
33、 no such code exists, in accordance with IS0 3741, IS0 3742, IS0 3743, IS0 3744 or IS0 37451 using the same installation and operating conditions as specified in clause 5. Li shall not be rounded prior to statistical calculations. ci The mean value is given by II - 1= 3 L = -E Li i= 1 d) The rules g
34、overning the decision shall be as follows: if E L, - 2 dB, the labelled value is not confirmed as NOTES 1 The above procedure is equivalent to the procedure outlined in IS0 7574f4 for: - a single sampling inspection, - a sample site of n = 3, and - a reference standard deviation of UM = 33 dB. The a
35、bove procedure is applicable for reproducibility conditions (see 3.17 in IS0 7574/1), and for repeatability conditions (see 3.16 in IS0 7574f 1). It should be ascertained that no outstanding systematic error of measurement results is connected with relevant laboratories. 2 If the actual total standa
36、rd deviation for this specific batch of machines differs from UM = 33 dB, see IS0 7574f4, clause 5, and annexes A and B. 7 Information to be given The specific measurement test code for the specific family of machines, or, if no such code exists, IS0 3741, IS0 3742, IS0 3743, IS03744 or IS0 3745, and the installation and operating conditions used shall be stated. 1) This does not preclude the use of other International Standards, e.9. IS0 3746, which may form the basis of the special measurement test code.
