ISO INTERNATIONAL STANDARD 12999-2 First edition 2020-06 Acoustics Determination and application of measurement uncertainties in building acoustics Part 2: Sound absorption Acoustique - Détermination et application des incertitudes de mesure dans I'acoustiquedes batiments- Partie 2: Absorption acoustique Reference number IS0 12999-2:2020(E) ISO @ IS0 2020 IS0 12999-2:2020(E) COPYRIGHT PROTECTED DOCUMENT ISO2020 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 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 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved