ISO INTERNATIONAL STANDARD 14163 First edition 1998-10-15 Acoustics Guidelines for noise control by silencers Acoustique Lignes directrices pour la réduction du bruit au moyen de silencieux Reference number ISO 14163:1998(E) ISO 14163:1998(E) Contents 1Scope 2 Normative references 3Termsanddefinitions 4 Specification, selection and design considerations. 4.1 Requirements to be specified ... 4.2 Selection and layout of silencers 4.3 Design of special silencers. 5 Types of silencers, general principles and operational considerations 5.1Overview 5.2 Acoustic and aerodynamic performance of silencers . 5.3 Sound propagation paths 5.4 Acoustic installation effect 5.5 Abrasion resistance and protection of absorbent surfaces.... 5.6 Fire hazards and protection against explosion 5.7 Starting-up and closing-down of plants 5.8 Corrosion. 5.9 Hygienic requirements and risk of contamination 9 5.10 Inspection and cleaning, decontamination. 6 Performance characteristics of types of silencers. .10 6.1 Dissipative silencers 10 6.2 Reactive silencers 6.3 Blow-off silencers 29 @ISO1998 All rights reserved. Unless otherwise specified, 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 permission in writing from the publisher. InternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland @ ISO ISO 14163:1998(E) 7 Measurement techniques 30 7.1 Laboratory measurements .30 7.2 Measurements in situ 31 7.3 Measurements on vehicles.. .31 8 Information on silencers 31 8.1 Information to be provided by the user.. 31 8.2 Information to be provided by the manufacturer .... AnnexA (informative) Applications 33 Annex B (informative) Effect of spectral distribution of sound on the declaration of attenuation in one-third-octave or octave bands... .40 Annex C (informative) Operating temperatures of sound sources and temperature limits of sound-absorbent materials.. 42 Bibliography... ili