International ISO Standard ISO9613-2 Acoustics Attenuation of sound Second edition during propagation outdoors 2024-01 Part 2: Engineering method for the prediction of sound pressure levels outdoors Acoustique - Atténuation du son lors de sa propagation a I'air libre- Partie 2: Méthode d'ingénierie pour la prediction des niveaux de pression acoustique en extéerieur Reference number ISO 9613-2:2024(en) @ISO 2024 IS0 9613-2:2024(en) COPYRIGHT PROTECTED DOCUMENT @IS02024 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2024 - All rights reserved ii