ISO INTERNATIONAL STANDARD 9612 Second edition 2009-04-01 Acoustics Determination of occupational noise exposure Engineering method Acoustique Détermination de I'exposition au bruit en milieu de travail - Méthode d'expertise Reference number ISO 9612:2009(E) @ISO2009 by IHS under lic ted without license from IHS Not for Resale ISO 9612:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2009 - All rights reserved edwithout license from IHS Not for Resale ISO 9612:2009(E) Contents Page Foreword IV Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols. 5 Instrumentation. 6 Methodology Chronological steps. 7 Work analysis.. 8 Selection of measurement strategies. 9 Strategy 1 Task-based measurement.. 10 Strategy 2 Job-based measurement 12 11 Strategy 3 Full-day measurement... 14 12 Measurements.. 13 Sources of uncertainty .. 14 Calculation of measurement uncertainties and presentation of the final results.. 15 Information to be reported... Annex A (informative) Example of a checklist to ensure that significant noise events are detected during the work analysis... 21 Annex B (informative) Guide to the selection of measurement strategy AnnexC(normative)Evaluationofmeasurementuncertainties Annex D (informative) An example showing calculation of daily noise exposure level using task- basedmeasurements.. 33 Annex E (informative) An example showing calculation of daily noise exposure level using job-based measurements .. 37 Annex F (informative) Sample calculation of daily noise exposure level using full-day measurements... .40 Bibliography ... Copyright International OrganizationfSandardizalionghtsreserved ii se from IHS Not for Resale