BS-EN-20140-2-1993 BS-2750-2-1993 ISO-140-2-1991.pdf

BRITISH STANDARD BS EN 20140-2:1993 BS 2750-2: 1993 ISO 140-2: 1991 Acoustics Measurement of sound insulation in buildings and of building elements Part 2: Determination, verification and application of precision data The European Standard EN 20140-2:1993 has the status of a British Standard UDC 699.844:534.6:534.833.522.4 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 20140-2:1993 This British Standard, having been prepared under the direction of the Environment and Pollution Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 May 1993 © BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference EPC/1 Draft for comment 89/33746 DC ISBN 0 580 21487 7 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation française de normalisation GermanyDeutsches Institut für Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portuguès da Qualidade SpainAsociación Española de Normalización y Certificación SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 20140-2:1993 © BSI 10-1999i Contents Page Cooperating organizations Inside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions3 4Determination of the repeatability value r and the reproducibility value R by inter-laboratory tests5 5Verification procedure9 6Application of repeatability values r and reproducibility values R10 Annex A (normative) Precision of sound insulation in buildings and of building elements12 Annex B (informative) Repeatability values r and reproducibility values R for results expressed in single-number quantities15 Annex C (informative) Bibliography15 National annex NA (informative) Committees responsible16 National annex NB (informative) Cross-references Inside back cover Table 1 Factor m9 Table A.1 Repeatability values for laboratory tests13 Table A.2 Reproducibility values for laboratory tests14 Table A.3 Reproducibility values for field tests15 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 20140-2:1993 ii © BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Environment and Pollution Standards Policy Committee. It is the English language version of EN 20140-2:1993 Acoustics Measurement of sound insulation in buildings and of building elements Part 2: Determination, verification and application of precision data, published by the European Committee for Standardization (CEN), which is identical with ISO 140-2:1991, published by the International Organization for Standardization (ISO). It supersedes BS 2750-2:1980, which is withdrawn. 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 title page, pages 2 to 16, 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. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 20140-2 March 1993 UDC 699.844:534.6:534.833.522.4 Descriptors: Acoustics, acoustic measurements, acoustic insulation, buildings, structural members, acoustic tests, data, fidelity English version Acoustics Measurement of sound insulation in buildings and of building elements Part 2: Determination, verification and application of precision data (ISO 140-2:1991) Acoustique Mesurage de lisolation acoustique des immeubles et des éléments de construction Partie 2: Détermination, vérification et application des données de fidélité (ISO 140-2:1991) Akustik Messung der Schalldämmung in Bauten und von Bauteilen Teil 2: Angabe von Genauigkeitsanforderungen (ISO 140-2:1991) This European Standard was approved by CEN on 1993-02-12. 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. 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 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 © 1993 Copyright reserved to CEN members Ref. No. EN 20140-2:1993 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 20140-2:1993 © BSI 10-1999 2 Foreword Following the positive result of primary questionnaire, CEN Technical Board decided to submit ISO 140-2:1991 Acoustics Measurement of sound insulation in buildings and of building elements Part 2: Determination, verification and application of precision data to the formal vote. The result was positive. This European Standard shall be given the status of a national standard, either publication of an identical text or by endorsement, at the latest by September 1993, and conflicting national standards shall be withdrawn at the latest by September 1993. In accordance with the CEN/CENELEC Internal Regulations, 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 United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 20140-2:1993 © BSI 10-19993 1 Scope This part of ISO 140 specifies procedures for assessing the uncertainty in the acoustical measurements described in ISO 140-3 to ISO 140-9 due to random and systematic influences. It gives guidelines for determination of the repeatability value r and the reproducibility value R; verification of repeatability values r and reproducibility values R for different measurement arrangements in one laboratory and for comparisons between different laboratories; application of repeatability values r and reproducibility values R in practice. Tentative repeatability values and reproducibility values of the test methods according to ISO 140-3, ISO 140-4 and ISO 140-6 to ISO 140-8 are given in Annex A. NOTE 1At present no data are available for ISO 140-5 and ISO 140-9. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 140. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 140 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 140-3:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part3: Laboratory measurements of airborne sound insulation of building elements. ISO 140-4:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 4: Field measurements of airborne sound insulation between rooms. ISO 140-5:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 5: Field measurements of airborne sound insulation of facade elements and facades. ISO 140-6:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 6: Laboratory measurements of impact sound insulation of floors. ISO 140-7:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 7: Field measurements of impact sound insulation of floors. ISO 140-8:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 8: Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a standard floor. ISO 140-9:1985, Acoustics Measurements of sound insulation in buildings and of building elements Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it. ISO 717-1:1982, Acoustics Rating of sound insulation in buildings and of building elements Part 1: Airborne sound insulation in buildings and of interior building elements. ISO 717-2:1982, Acoustics Rating of sound insulation in buildings and of building elements Part 2: Impact sound insulation. ISO 717-3:1982, Acoustics Rating of sound insulation in buildings and of building elements Part 3: Airborne sound insulation of facade elements and facades. ISO 5725:1986, Precision of test methods Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests. 3 Definitions For the purposes of this part of ISO 140, the following definitions apply. Whenever applicable, they are equivalent to those given in ISO 3534, ISO 5725 and in the International vocabulary of basic and general terms in metrology. 3.1 test result, y the final value obtained in a single frequency band by following the complete set of instructions given in a test method NOTE 2A set of test results is obtained since a determination is carried out in several frequency bands. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 20140-2:1993 4 © BSI 10-1999 3.2 true value, u the value characterizing a quantity perfectly defined under the conditions existing when that quantity is considered. For practical purposes, it is the arithmetic mean of test results obtained by a large number of laboratories. Consequently, such a practical true value is associated with the particular test method 3.3 accuracy of the mean the closeness of agreement between the true value and the mean result obtained by applying the test method a very large number of times the smaller the systematic part of the experimental errors affecting the results, the more accurate is the test method 3.4 precision the closeness of agreement between mutually independent test results obtained under prescribed conditions NOTE 3Precision depends only on the distribution of random errors and does not relate to the true value or the specified value. NOTE 4Repeatability and reproducibility are concepts of precision. See ISO 5725. 3.5 arithmetic mean, the arithmetic mean of test results, given by the equation where n is the number of test results yi 3.6 sample variance, s2 the sum of squares of the deviations from the arithmetic mean of test results, divided by the number of degrees of freedom. In the simple case of n consecutive (ungrouped) test results, the sample variance is given by the equation 3.7 standard deviation, s the square root of the sample variance 3.8 number of degrees of freedom, v the number of independent terms contained in the expression for the sample variance. In the simple case of n consecutive (ungrouped) test results 3.9 repeatability the closeness of agreement between mutually independent test results obtained under repeatability conditions NOTE 5Repeatability can depend on the type of construction (homogeneity, resonance, etc.). . . . (1) y . . . (2) v = n 1. . . (3) Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 09:27:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 20140-2:1993 © BSI 10-19995 3.10 repeatability conditions conditions where mutually independent test results are obtained with the same method on identical test material in the same laboratory with the same equipment by the same operator within short intervals of time 3.11 repeatability standard deviation, sr the standard deviation of test results obtained under repeatability conditions. It is a parameter of dispersion of the distribution of test results under repeatability conditions NOTE 6Similarly, the repeatability variance and repeatability coefficient of variation could be defined and used as parameters of dispersion of test results under repeatability conditions. 3.12 repeatability value, r the value below which the absolute difference between two single test results obtained under repeatability conditions may be expected to lie with a probability of 95 % 3.13 reproducibility the closeness of agreement between test results obtained under reproducibility conditions NOTE 7Reproducibility can depend on the type of construction (homogeneity, resonance, etc.). 3.14 reproducibility conditions conditions where test results are obtained with the same method on identical test material in different laboratories with different operators using different equipment 3.15 reproducibility standard deviation, sR the standard deviation of test results obtained under reproducibility conditions. It is a parameter of dispersion of the distribution of test results under reproducibility conditions NOTE 8Similarly, the reproducibility variance and reproducibility coefficient of variation could be defined and used as parameters of dispersion of test results under reproducibility conditions. 3.16 reproducibility value, R value below which the absolute difference between two single test results obtained under repr