BS EN IS0 5135:2020 BSl Standards Publication Acoustics Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation test room bsi. BSENIS05135:2020 BRITISH STANDARD National foreword This British Standard is theUK implementation of EN IS05135:2020.It is identical to IS0 5135:2020. It supersedes BS EN IS0 5135:1999, which is withdrawn. TheUKparticipationinitspreparationwas entrustedtoTechnical Committee EH/1/4, Machinery noise. A list oforganizations represented on this committee can be obtained on request to its committee manager. This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. @TheBritishStandardsInstitution2020 Published by BSI Standards Limited 2020 ISBN9780539019933 ICS91.140.30; 17.140.20 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2020. Amendments/corrigendaissuedsincepublication Date Text affected EN IS0 5135 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHE NORM September 2020 ICS17.140.20 Supersedes ENIS0 5135:1998 English Version Acoustics - Determination of sound power levels of noise fromair-terminaldevices,air-terminalunits,dampers andvalves bymeasurementin areverberationtestroom (IS05135:2020) Acoustique-Détermination des niveaux depuissance Akustik-Bestimmung des Schallleistungspegels acoustique du bruit émis par les bouches d'air, les von Gerauschen von Luftdurchlassen, unites terminales,les registres et clapets au moyen Volumendurchflussreglern, Drossel- und demesuragesen salleréverbérante (IS05135:2020) Absperrelementen durch Messungen imHallraum (IS05135:2020) This European Standard was approved by CEN on 7 August 2020. this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standardsmaybeobtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made bytranslation under the responsibility ofa CEN member into its own languageand notified to the CEN-CENELEC Management Centrehasthesame status asthe official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FURNORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2020CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5135:2020: E worldwidefor CEN national Members