7574/1 (ISO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPTAHW3AUMH O CTAHAAPIW3AUWW-ORGANISATION INTERNATIUNALE DE NORMALISATION Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and equipment - Part 1: General considerations and definitions Acoustique-Methodes statistiques pourla determination et le controle des valeurs declarees d'emission acoustique des machines et équipements - Partie 1: Generalites et definitions First edition -1985-12-15 ISO 7574/1-1985 (E) UDC 534.835.46 : 512.24 Ref.No.ISO7574/1-1985 (E) Descriptors : acoustics, machinery, noise (sound), statistical quality control, statistical analysis. detinitions. Price based on 4 pages 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 comnittee. International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committecs are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with iso procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7574/1 was prepared by Technical Committee ISO/TC 43, Acoustics. Uscrs should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International OrganizationforStandardization,1985 Printed in Switzerland INTERNATIONALSTANDARD ISO 7574/1-1985 (E) Acoustics -- Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 1: General considerations and definitions IntroductiontoIso7574 0 mentioned above are relevant or whether the methods for determining and verifying stated noise emission values should In order to state the noise emission value for a machine or a be applied. This is left to a labelling code specific to the batch of machines in an unambiguous manner, this four-part machinery or equipmcnt concerned or, if this does not exist, to series of International Standards provides guidelines for deter- an agreement between the users of the standards (e.g. in a mining the noise emission value to be stated (c.g. as a labelled contract). value) and specifies verification procedures. These methods are based on the premise of clearly defined acoustical measure- Two cases are considered: ment mcthods and describe the handling of the variability of the measurement results and, if relevant, of the noise emissions the stated value is given for one individual machine; of the machines in a batch. the stated value is given for an entire batch of The methods presented in this series of International Standards machines. are compatible with the requirements specified in IS0 4871, For economic reasons, thc stated values for batches of series- i.c., produced machines may be verified by sampling procedures. the stated (e.g. labelled) value indicates the limit below This four-part series of International Standards does not deal which the noise emission value of the individual machine and/or a specified large proportion of the noise emission with the consequences that ensue if the stated value is not values of the batch lies; verified for a single machine or for a batch (lot) of machines. This series of International Standards which comprisc ISo 7574 the basic noise emission quantity usedisthe requires that the labelled value be determined using the same A-weighted sound power level. measurement test c