ISO INTERNATIONAL STANDARD 20189 First edition 2018-11 Acoustics Screens, furniture and single objects intended for interior use Rating of sound absorption and sound reduction of elements based on laboratory measurements Acoustique -Meubles, écrans et objets uniques destineés a usage intérieur - Note de I'absorption acoustique et de réduction acoustique des éléments baseée sur des mesures en laboratoire Reference number IS0 20189:2018(E) @IS02018 IS0 20189:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 20189:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Methods to measure and evaluate various interior acoustic products .3 4.1 Single objects .3 4.1.1 General .3 4.1.2 Single object sound absorption. ..3 4.2 Deskscreens 4 4.3 Floor screens. 4 4.3.1 General .4 4.3.2 Floorscreen soundabsorption 4 4.3.3 Floor screen sound attenuation .4 4.3.4 Floor screen sound insulation. 4 4.4 Furniture ensembles. .5 4.4.1 General. 5 4.4.2 Furniture ensembles sound absorption 5 4.5 Single objects that are tightly connected to form a surface greater than or equal to 10 m2 5 4.6 Other single objects 5 5 Statement of results .5 5.1 .5 Results for sound absorption 5.2 Results for floor screen sound attenuation .5 5.3 Resultsforsoundinsulation . 6 5.4 Other information to be reported .6 Annex A (normative) Presentation of equivalent sound absorption area .7 Annex B (normative) Examples for the deduction of object sound absorption coefficient, aobj .9 Annex C (normative) Presentation of floor screen sound attenuation ..14 Annex D (normative) Presentation of screen sound insulation .15 Annex E (normative) Mounting conditions in the laboratory ..17 Annex F (informative) Guidelines on suitable values for sound insulation for different screen heights. .27 Bibliography .28 @ IS0 2018 - All rights reserved iii