1、 IEC 61988-2-5 Edition 1.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Plasma display panels Part 2-5: Measuring methods Acoustic noise Panneaux daffichage plasma Partie 2-5: Mthodes de mesure Bruit acoustique IEC 61988-2-5:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Gen
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15、nal (VEI) en ligne. Service Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61988-2-5 Edition 1.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Plasma display panels Part 2-5: Measuring
16、 methods Acoustic noise Panneaux daffichage plasma Partie 2-5: Mthodes de mesure Bruit acoustique INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE L ICS 31.260 PRICE CODE CODE PRIX ISBN 978-2-83220-089-6 Registered trademark of the International Electrotechnical C
17、ommission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61988-2-5 IEC:2012 CONTENTS FOREWORD . 3 1
18、Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 4 Structure of measuring equipment 6 5 Standard measuring conditions . 6 6 Measuring method 6 6.1 Purpose 6 6.2 Measuring equipment 6 6.2.1 Equipment list 6 6.2.2 Anechoic chamber . 6 6.2.3 Silent room 6 6.2.4 Sound level meter 7 6.3 M
19、easuring conditions 7 6.3.1 Layout . 7 6.3.2 Standard measuring distance 7 6.3.3 Measuring point . 7 6.3.4 Input video signal 7 6.3.5 Warm-up conditions . 7 6.3.6 Measuring frequency range . 8 6.3.7 Measuring bandwidth . 9 6.3.8 Weighting filter 9 6.4 Calculation of overall acoustic noise level . 9
20、6.5 Measurement procedure 9 6.6 Measurement report 10 Bibliography 11 Figure 1 Setting of measuring equipment . 8 Figure 2 Measuring point . 8 Table 1 Example of acoustic noise measurement result . 10 61988-2-5 IEC:2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PLASMA DISPLAY PANELS Part 2-5: Me
21、asuring methods Acoustic noise FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions co
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30、penses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) At
31、tention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61988-2-5 has been prepared by IEC technical committee 110: Electroni
32、c display devices. The text of this standard is based on the following documents: FDIS Report on voting 110/355/FDIS 110/373/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in ac
33、cordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 61988 series, published under the general title Plasma display panels, can be found on the IEC website. 4 61988-2-5 IEC:2012 The committee has decided that the contents of this publication will remain unchanged until th
34、e stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 61988-2-5 IEC:2012 5 PLASMA DISPLAY PANELS Part 2-5: Measuring method
35、s Acoustic noise 1 Scope This part of IEC 61988 determines the following measuring methods for characterizing the performance of PDP modules (plasma display modules): Acoustic noise 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and a
36、re indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050 (all parts), International Electrotechnical Vocabulary (available at ) IEC 60068-1, Environm
37、ental testing Part 1: General and guidance IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications IEC 61988-1, Plasma display panels Part 1: Terminology and letter symbols IEC 61988-2-1, Plasma display panels Part 2-1: Measuring methods Optical and optoelectrical IEC 61988-4, Plasma
38、 display panels Part 4: Climatic and mechanical testing methods ISO 7574-1, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 1: General considerations and definitions 3 Terms and definitions For the purposes of this document, th
39、e terms and definitions given in IEC 60050-801:1994, IEC 60068-1 and IEC 61988-1 and the following apply. 3.1 acoustic noise audible noise generated by the driving of PDP module, and caused by the vibrations of panel, electric components, wirings and circuits Note 1 to entry: The noise depends on th
40、e image displayed, module (panel) temperature, environmental pressure and surrounding mechanical (acoustic) conditions. 3.2 acoustic noise level L sum of acoustic noise levels that are measured at the individual octave band in the measuring frequency range 6 61988-2-5 IEC:2012 3.3 acoustic noise lev
41、el at f Hz L fnoise amplitude that is measured at the centre frequency of individual 1/3 octave bands in the centre frequency range of 250 Hz 20 000 Hz Note 1 to entry: The centre frequencies of the individual 1/3 octave bands are 250 Hz, 315 Hz, 400 Hz, 500 Hz, 20 000 Hz. 4 Structure of measuring e
42、quipment The system diagrams and/or driving conditions of the measuring equipment shall comply with the structure specified in each item. 5 Standard measuring conditions Measurements shall be carried out under the standard environmental conditions defined in IEC 61988-2-1, i.e. at a temperature of 2
43、5 C 3 C, a relative humidity of 25 % to 85 %, and a pressure of 98 kPa to 104 kPa, if not otherwise specified in the relevant specifications. When different conditions are used, they shall be noted in the report. The standard reference atmosphere defined in IEC 61988-4, i.e. 25 C and 101,3 kPa, is a
44、pplied. 6 Measuring method 6.1 Purpose The purpose of this method is to measure the acoustic noise of a PDP module. 6.2 Measuring equipment 6.2.1 Equipment list The following equipment shall be used: a) anechoic chamber or silent room; b) sound level meter; and c) pattern generator. NOTE Microphone
45、and FFT (Fast Fourier Transformation) analyser with control PC can be used when calibrated against a calibrated sound level meter. 6.2.2 Anechoic chamber An anechoic chamber with an enough size for the measurement should be used. The details of the anechoic chamber shall be noted on the report. The
46、conditions of the anechoic chamber defined in ISO 7574-1 shall be applied, if not otherwise defined in this measurement method. The background noise level of the anechoic chamber shall be measured and noted in the report. 6.2.3 Silent room When any proper anechoic chamber is not available, a silent
47、room where the background sound level is small enough for the measurement can be used. In the case of using a silent room, the size of the room should be large enough and the sound reflection from the wall, ceiling and floor shall not affect the measurement result. The background noise level of the
48、silent room shall be measured and noted in the report. 61988-2-5 IEC:2012 7 6.2.4 Sound level meter A well calibrated sound level meter shall be used. The details are defined in IEC 61672-1. NOTE Microphone and FFT analyser with control PC can be used when calibrated against a calibrated sound level
49、 meter. 6.3 Measuring conditions 6.3.1 Layout The PDP module shall be set in the anechoic chamber or the silent room as shown in Figure 1. The driving power source, control PC and pattern generator should be set outside the room. The power and signal lines shall be arranged in order to be free from any unwanted vibrations. The microphone shall be aligned perpendicular to the screen centre. The deta
