(ISO 7574/2 nternational Standard Inte rnaTional ORGanization For StanDarDization mexayhapoahaA OPraM3aunr no ctaHaapth3AunW-organisation Inte rnationale De normaLisation Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and eguipment Part 2 : Methods for stated values for individual machines Acoustique - Methodes statistiques pour la determination et le controle des valeurs declarees d'émission acoustique des machines et équipements -- Partie 2 : Methodes pour valeurs declarees de machines individuelles First edition - 1985-12-15 UDC 534.835.46 : 512.24 Ref. No. ISO 7574/2-1985 (E) ISO 7574/2-1985 ( Descriptors : acoustics, machinery, noise (sound), statistical quality control, statistical analysis Price based on 2 pages Copyright International Organization for Standardization ense from IHS Not for Resale Foreword ISO (the International Organization for Standardization) is a worldwide federation of 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 committee. International organizations, govern- 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. International Standard ISO 7574/2 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 latest edition, unless otherwise stated. Internationat Organization for Standardization, 1985 Printed in Switzerland Copyright Intenatinal Organization for Standardization tworking permited without license from IHS Not for Resale ISO 7574/2-1985 (E) INTERNATIONALSTANDARD Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and eguipment Part 2: Methods for stated values for individual machines Introduction 0 Iso 3744, Acoustics - Determination of sound power levels of noise sources - Engineering methods for free-field conditions A general introduction to the four-part series of ISo 7574 is overa reflecting plane. given in ISO 7574/1. Determination of sound power levels of ISO3745,Acoustics For the purposes of this part of IS0 7574, the term "labelled noise sources - Precision methods for anechoic and semi- value"' stands for all kinds of stated values (e.g. information oi anechoic rooms a label, the upper noise limit set by an authority, the agreed contract value) for which the methods may be applied. Iso 3746, Acoustics - Determination of sound power levels of noise sources - Survey method. The methods described in this part of iSO 7574 are of a Iso 4871, Acoustics statistical nature only in a restricted sense. Statistical view- Noise labelling of machinery and points are relevant mainly when estimating the value of K (see equipment. clause 5). ISO 7574/1,Acoustics -- Statistical methods for determining and verifying stated noise emission values of machinery and Scope and field of application 1 equipment -- Part 1: General considerations and definitions. This part of ISo 7574 provides guidelines for determining the ISO 7574/4, Acoustics Statistical methods for determining labelled values of the noise emissions of individually-labelled and verifying stated noise emission values of machinery and machinery and equipment, that is, in the situation in which equipment -- Part 4: Methods for stated values for batches of each machine produced has its own individually-labelled value machines. of its noise emission quantity. It also specifies a method for verifyin