ISO INTERNATIONAL STANDARD 4412-1 Second edition 1991-08-15 Hydraulic fluid power -.. Test code for determination of airborne noise levels -- Part 1: sdund Transmissions hydrauliques -- Code d'essai pour la determination du niveau de bruit aerien - Partie 1: Pompes Reference number ISO 4412-1:1991(E) Copyright International Organization for Standardization etworking permitted without license from IHS Not for Resale ISO 4412-1:1991(E) Contents Page Scope 1 2 Normative references Definitions 1 Measurement uncertainty 2 4 5 Test environment 2 6 Instrumentation 2 Installation conditions 2 7 8 Operating conditions 3 Location and number of sound measurement points 9 4 10 Test procedure 11 Information to be recorded 4 Test report 12 6 13 Identification statement (Reference to this part of IsO 4412) 6 Annexes Calculation of sound levels A 7 Errors and classes of measurement 8 B Guidelines for the application of this part of isO 4412 9 c Bibliography 20 D C1SO1991 All rights reserved. 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 pubfisher. International Organization for Standardization Case Postale 56: CH-1211 Geneve 20 : Switzerland Printed in Switzerland Copyright International Organization for Standardization e from IHS Not for Resale ISO 4412-1:1991(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (lsO member bodies).The work of preparing International Standards is normally carried out through isO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnica! Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. Committees isO/TC 131, Fluid power systems, $ Sub-Committee SC 8 Product testing and contamination control and IsO/TC 43, Acoustics. This second edition cancels and replaces the first edition (iso 4412-1:1979). of which clauses 12 and 13 have been transferred to form a new annex A. The former annex A has become annex B, and annexes C and D have been added. IsO 4412 consists of the following parts, under the general title Hydraulic fluid power - Test code for determination of airborne noise levels: Part 1: Pumps Part 2: Motors - Part 3: Pumps -- Method using a parallelepiped microphone array Annexes A and B form an integral part of this part of IsO 4412. Annexes C and D are for information only. CopyihtInenationalOrganizationfor Standadization No reproduction or networking permited without iense from IHS Not for Resale