ISO INTERNATIONAL STANDARD 17201-3 Second edition 2019-01 Acoustics Noise from shooting ranges - Part 3: Sound propagation calculations Acoustique - Bruit des stands de tir - Partie 3: Calcul de la propagation du son Reference number ISO 17201-3:2019(E) so @ IS0 2019 IS0 17201-3:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 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 or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 17201-3:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Source modelling. 4.1 General .2 4.2 Muzzleblast .2 4.2.1 Background. .2 4.2.2 Free-field situation ..3 4.2.3 Non-free-field situation 3 4.3 Projectile sound .6 5 Propagation calculation .6 5.1 General .6 5.2 Application of IS0 9613-2 for free-field situations .6 5.3 Application of IS0 9613-2 for non-free-field situations .8 5.4 Sophisticated models ..8 6 Conversion of sound exposure levels ..9 7 Uncertainties ..10 Annex A (normative) Benchmark cases for shooting sheds with baffles .11 Annex B (informative) Sophisticated modelling approaches ..27 Annex C (informative) Modelling of shooting scenarios - Examples of shooting ranges ..36 Annex D (informative) Uncertainty ..54 Bibliography .58 @ IS0 2019 - All rights reserved iii