ISO INTERNATIONAL STANDARD 11546-2 First edition 1995-12-15 Acoustics Determination of sound insulationperformancesofenclosures Part 2: Measurements in situ (for acceptance and verification purposes) AcoustiqueDeterminationdeI'isolement acoustiquedes encoffrements Partie 2:Mesurages sur site (aux fins d'acceptation et de verification ISO Reference number ISO 11546-2:1995(E) ISO11546-2:1995(E) Contents Page 1 Scope 2 Normativereferences 3 Definitions 2 4 Choice of measurement method 3 5 Instrumentation 6 Testmethods applicabletoenclosureswiththeactual sound source 6.1 General 4 6.2 Determination of sound power insulation 5 6.3 Determination of sound pressure insulation at a specified position 5 7 Test methods applicable to enclosures without the actual sound source 6 7.1 General 6 7.2 Artificial sound sourcemethod 6 7.3 Weighted sound power insulation 7.4 Estimated noise insulation due to the enclosure for a specific noise spectrum 8 Uncertainty 9 Information to be recorded 7 9.1 Test object 9.2 Test conditions 9.3 instrumentation 8 9.4 Acoustical data 8 9.5 Further information 8 10 lnformationtobereported ISO1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. International OrganizationforStandardization CasePostale56.CH-1211Geneve20·Switzerland Printed in Switzerland Copvriaht International Oraanization for Standardization oISO ISO11546-2:1995(E) Annexes A Artificial sound source 9 B Example of a source spectrum 11 c Guidelines for evaluating the applicability of different test environmentsforinsitumeasurements 12 D Estimated noise insulation due to the enclosure for a specific noisespectrum 15 E Bibliography 16 ili