INTERNATIONAL ISO STANDARD 9614-1 First edition 1993-06-01 Acoustics Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points Acoustique -Détermination par intensimetrie des niveaux de puissance acoustique émis par les sources de bruit Partie1:Mesuragesparpoints Reference number ISO9614-1:1993(E) Copyright International Organization for Standardization ithout license from IHS Not for Resale ISO 9614-1:1993(E) Contents Page 1 Scope 2 Normative references 3 Definitions 4 General requirements 3 5 Acoustic environment 4 6 Instrumentation 5 7 Installation and operation of the source 5 8 Measurementofnormalsoundintensitycomponentlevels 9 Calculation of sound power level 7 10 Information to be reported 8 Annexes A Calculation of field indicators 10 B Procedure for achieving a desired grade of accuracy 12 C Effects of airflow on measurement of sound intensity 16 D Effect of sound absorption within the measurement surface 17 E Bibliography 18 ?ISO1993 All rights reserved.No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per- mission in writing from the publisher. International OrganizationforStandardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii Copyright International Organization for Standardization I without license from IHS Not for Resale ISO 9614-1:1993(E) 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 committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC):on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9614-1'was prepared by Technical Committee ISO/TC43,Acoustics,Sub-CommitteeSc1,Noise. Iso 9614 consists of the following parts, under the general title Acoustics - Determination of sound power levels of noise sources using sound intensity. - Part 1: Measurement at discrete points -Part2:Measurementbyscanning Annexes A and B form an integral part of this part of iSO 9614. Annexes C, D and E are for information only. ili opyright InternationalOrganizationfor Standardization