ISO INTERNATIONAL STANDARD 6969 Third edition 2004-07-01 Road vehicles Sound signalling devices Tests after mounting on vehicle Véhicules routiers — Avertisseurs sonores — Essais apres montage surlevehicule Reference number A ISO 6969:2004(E) ISO @ ISO 2004 ISO 6969:2004(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation ? ISO2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2004 - All rights reserved ISO 6969:2004(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 non-governmental, in liaison with IsO, also take part in the work. Iso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 6969 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. This third edition cancels and replaces the second edition (isO 6969:1999), which has been technically revised. izatiorn'ghts reserved ii Copvriaht International Oraanization for Standardization INTERNATIONAL STANDARD ISO 6969:2004(E) Road vehicles Sound signalling devices Tests after mounting on vehicle 1 Scope This International Standard specifies the testing of sound signalling devices in accordance with IsO 512, to be carried out after mounting on the vehicle. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated document (including any amendments) applies. IsO 512:1979, Road vehicles —Sound signalling devices — Technical specifications IEC 61672 (all parts), Electroacoustics — Sound level meters 1) Measuring apparatus The measurement of sound pressure levels shall be made using a sound level meter in accordance with IEC61672. When a device for protection of the sound level meter against wind is used, its effect on the measuring accuracy shall be taken into account according to the indications of the manufacturer. The electrical measurements shall be made using instruments of the class 0,5 as specified in IEC 61672. The measurements of lengths shall be made with a tolerance of ± 0,05 m. 4 Expression of results The results of the measurements of the sound pressure levels shall be in relation to 2 × 10-5 Pa (N/m2) weighted in accordance with curve A as specified in IEC 61672, with the A-weighted results expressed i