ISO-13472-1-2002.pdf
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1、INTERNATIONAL STANDARD ISO 13472-1 First edition 2002-06-15 Reference number ISO 13472-1:2002(E) ISO 2002 Acoustics Measurement of sound absorption properties of road surfaces in situ Part 1: Extended surface method Acoustique Mesurage in situ des proprits dabsorption acoustique des revtements de ch
2、ausses Partie 1: Mthode de la surface tendue Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 21:47:05 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
3、O 13472-1:2002(E) ii ISO 2002 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes 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
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6、ral Secretariat at the address given below. ISO 2002 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 either ISO a
7、t the address below or ISOs 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 copyrightiso.ch Web www.iso.ch Printed in Switzerland Copyright International Organization for Standardization Provided
8、by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 21:47:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13472-1:2002(E) ISO 2002 All rights reserved iii Contents Page 1Scope . 1 2Normative references . 1 3Terms an
9、d definitions 1 4Summary of the method . 3 4.1General principle . 3 4.2Signal separation techniques 4 4.3Test method . 6 5Test system . 7 5.1Components of the test system . 7 5.2Sound source 7 5.3Test signal 7 6Data processing 7 6.1Calibration . 7 6.2Sampling frequency . 7 6.3Recovery of the overall
10、 impulse response . 7 6.4Temporal separation of the signals 8 7Positioning of the equipment 8 7.1Maximum sampled area 8 7.2Positioning of the measuring equipment 8 7.3Reflecting objects 9 7.4Background noise 9 7.5Safety considerations 9 8Road surface and meteorological conditions 9 8.1Condition of t
11、he road surface 9 8.2Wind 9 8.3Temperature 9 9Measurement procedure 10 10Measurement uncertainty . 10 11Test report 11 Annexes ARadius of the maximum sampled area . 12 BReference measurement and correction procedure 13 CPhysical principle of the measurement . 14 DMeasurement using an MLS test signal
12、 16 EExample of a test report 18 FSound absorption coefficient at non-normal incidence . 21 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 21:47:05 MDTNo reproduction or network
13、ing permitted without license from IHS -,-,- ISO 13472-1:2002(E) iv ISO 2002 All rights reserved GCorrection of small time shifts in the direct impulse response between the free-field measurement and the reflected measurement . 23 Bibliography. 26 Copyright International Organization for Standardiza
14、tion Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 21:47:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13472-1:2002(E) ISO 2002 All rights reserved v Foreword ISO (the International Organization for
15、 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
16、right to be represented on that committee. International organizations, governmental and 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. Internatio
17、nal Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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
18、bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 13472 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 13472-1 was prepared by Technical Committe
19、e ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. ISO 13472 consists of the following parts, under the general title Acoustics Measurement of sound absorption properties of road surfaces in situ: Part 1: Extended surface method Other parts are in preparation. Annexes A and B form a normative part of
20、 this part of ISO 13472. Annexes C, D, E, F and G are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 21:47:05 MDTNo reproduction or networking permitted wi
21、thout license from IHS -,-,- ISO 13472-1:2002(E) vi ISO 2002 All rights reserved Introduction This part of ISO 13472 describes a test method for measuring, in situ, the sound absorption coefficient of road surfaces as a function of frequency under normal incidence. This method provides a means of ev
22、aluating the sound absorption characteristics of a road surface without damaging the surface. It is intended to be used during road construction, road maintenance and other traffic noise studies. It may also be used to qualify the absorption characteristics of road surfaces used for vehicle and tyre
23、 testing. However, the standard uncertainty is limited to 0,05. This method in this part of ISO 13472 is based on free-field propagation of the test signal from the source to the road surface and back to the receiver, and covers an area of approximately and a frequency range, in one-third- octave ba
24、nds, from to . To complement this method, a spot method (will be part 2) is under development. This method is based on the transmission of the test signal from the source to the road surface and back to the receiver inside a tube and covers an area of approximately and a frequency range, in one-thir
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