7574/1 International Standard (TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEXKAYHAPOAHAA OPIAHW3AUMA O CTAHAAPTM3ALMWM-ORGANISATION INTERNATIONALE DE NORMALISATION Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and eguipment Part 1: General considerations and definitions Acoustique -- Methodes statistiques pour la determination et le controle des valeurs declarees d'émission acoustique des machines et équipements -- Partie 1: Géneralites et definitions First edition - 1985-12-15 UDC 534.835.46 : 512.24 Ref. No. ISO 7574/1-1985 (E) ISO 7574/1-1985 Descriptors : acoustics, machinery, noise (sound), statistical quality control, statistical anaiysis, definitions Price based on 4 pages Not for Resale Foreword national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through tsO technical committees. Each member body interested in a subject for which a technical committee has been established has mental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the technical committees 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. Internationat Standard ISO 7574/1 was prepared by Technical Committee ISO/TC 43, Acoustics. Users 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 fatest edition, unless otherwise stated. International Organization for Standardization, 1985 Printed in Switzerland Copyright Intermatinal Organization for Standardization ted withoutlicense from IHS Not for Resale No reproducti INTERNATIONAL STANDARD ISO 7574/1-1985 (E) Acoustics --- Statistical methods for determining and verifying stated noise emission values of machinery and eguipment - Part 1: General considerations and definitions 0 Introduction to ISO 7574 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 equipment 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 (e.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 methods 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 machines. The methods presented in this series of International Standards are compatible with the requirements specified in ISO 4871, For economic reasons, the stated values for batches of series- i.e. 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 with the consequences that ensue if the stated value is not and/or a specified large proportion of the noise emission verified for a single machine or for a batch (lot) of machines. values of the batch lies; This series of International Standards which comprise ISo 7574 the basic noise emission quantity used is the requires that the labelled value be determined using the same A-weighted sound power level. measurement test code as that specified for