ISO INTERNATIONAL STANDARD 9613-1 First edition 1993-06-01 Acoustics -- Attenuation of sound during propagation outdoors Part 1: Calculation of the absorption of sound by the atmosphere Acoustique - Attenuation du son lors de sa propagation a I'air libre - Partie 1: Calcul de I'absorption atmosphérique Referencenumber ISO 9613-1:1993(E) Copyright Intermational Organization for Standardizatior No reproduction or networking permitted without license from IHS Not for Resale ISO 9613-1:1993(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (lsO 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 circulatedtothe memberbodiesforvoting.PublicationasanInternational a vote. international Standard ISO 9613-1 was prepared by Technical Committee ISO/TC 43, Acoustics, Sub-Committee SC 1, Noise. iso 9613 consists of the following parts, under the general title Acoustics - Attenuation of sound during propagation outdoors: Part 1: Calculation of the absorption of sound by the atmosphere Part2:Ageneralmethodofcalculation Annexes A, B, C, D, E and F of this part of ISO 9613 are for information only. CISO1993 All rights reserved.No part of this publication may be reproduced or utilized in any form or mission in writing from the publisher. International Organization for Standardization Case Postale 56 · CH-1211 Geneve 20 : Switzerland Printed in Switzerland ii Organization for Standardization S under license with Not for Resale ISO 9613-1:1993(E) Introduction The aim of this International Standard is to specify methods of calculating ii Copyright Intermational Organization for Standardization Noreroductionorneworking ermitedwithutlicense from Not for Resale