ISO TECHNICAL REPORT TR 11688-1 First edition 1995-03-15 Acoustics Recommended practice for the design of low-noise machinery and equipment Part 1: Planning Acoustique -- Pratique recommandee pour la conception de machines et d'equipements a bruit réduit Partie 1: Planification ISo Reference number ISO/TR 11688-1:1995(E) No reproduction or networking permitted without icense from IHS Not for Resale ISO/TR 11688-1:1995(E) Contents Page 1 Scope... 2 References 3 Definitions. 2 4 Methodical design and acoustic aspects. 5 Conceptual and detailed design .. 5 6 Low-noise prototyping 23 7 Final testing.. 25 Annexes A Summary of design rules. 31 C Information to be reported. 34 D Bibliography .. .36 @ISO 1995 All rights reserved. Unless otherwise specified, 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 publisher. InternationalOrganizationforStandardization Printed in Switzerland ii NoreproductionornetworkingpermitedwithoutlicensefromHS Not for Resale @ISO ISO/TR 11688-1:1995(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO 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 ciosely with the Internation Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards, but in exceptional circumstances a technical committee may propose the publication of a Technical Report of one of the following types: type 1, when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts; possibility of an agreement on an International Standard; type 3, when a technical committee has collected data of a different kind from that which is normally published as an International Standard ("state of the art", for example). Technical Reports of types 1 and 2 are subject to review within three International Standards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. ISO/TR 11688-1, which is a Technical Report of type 3, was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. ISO 11688 consists of the following parts, under the general title Acoustics Recommended practice for the design of low-noise machinery and equipment: Part1:Planning [Technical Report] Part 2: Introduction into physics of low-noise design ili Copyright International Organization for Standardizatior ermited without license from IHS Not for Resale