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1、BRITISH STANDARD BS EN 60118-13:1998 IEC 60118-13: 1997 Hearing aids Part 13: Electromagnetic compatibility (EMC) Product standard The European Standard EN 60118-13:1997 has the status of a British Standard ICS 17.140.50; 33.100 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:19:02 GMT+00:
2、00 2006, Uncontrolled Copy, (c) BSI BS EN 60118-13:1998 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1998 BSI 05-1999 ISBN 0 580 29420 X National fore
3、word This British Standard is the English language version of EN 60118-13: 1997. It is identical with IEC 60118-13:1997. The UK participation in its preparation was entrusted to Technical Committee EPL/29, Electroacoustics, which has the responsibility to: aid enquirers to understand the text; prese
4、nt to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be
5、 obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain iden
6、tifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international
7、 or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a
8、 contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2
9、 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun she
10、ffieldun, na, Thu Nov 09 04:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60118-13:1998 BSI 05-1999i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60118-133 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
11、ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60118-13 October 1997 ICS 17.140.50; 33.100 Descriptors: Acoustics, hearing aids, electromagnetic compatibility, tests, measurement
12、s, levels English version Hearing aids Part 13: Electromagnetic compatibility (EMC) (IEC 60118-13:1997) Appareils de correction auditive Partie 13: Compatibilit lectromagntique (CEM) (CEI 60118-13:1997) Hrgerte. Teil 13: Elektromagnetische Vertrglichkeit (EMV) (IEC 60118-13:1997) This European Stand
13、ard was approved by CENELEC on 1997-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerni
14、ng such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its
15、 own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
16、Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in
17、 any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60118-13:1997 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60118-13:1997 BSI 05-1999 2 Foreword The text of document 29/367/FDIS, future edition 1 of IEC
18、60118-13, prepared by IEC TC 29, Electroacoustics, and SC 77B, High-frequency phenomena, of IEC TC 77, Electromagnetic compatibility, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60118-13 on 1997-10-01. The following dates were fixed: Annexes designated “normative
19、” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A and Annex B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 60118-13:1997 wa
20、s approved by CENELEC as a European Standard without any modification. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definitions and abbreviations4 4Operation and function of the product4 5Specification of EMC environment4 6Requirements for immunity4 7Immunity test procedures
21、5 8Overview of tests and performance criteria6 Annex A (informative) Background for establishing test methods, performance criteria and test levels7 Annex B (informative) Bibliography8 Annex ZA (normative) Normative references to international publications with their corresponding European publicati
22、onsInside back cover Table 1 Field strengths of RF test signals to be used to establish immunity at a stated distance for class 1 hearing aids5 Table 2 Requirements to establish hearing aid immunity6 latest date by which the EN has to be implemented at national level by publication of an identical n
23、ational standard or by endorsement(dop) 1998-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1998-07-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60118-13:1997 BSI 05-19993 Introdu
24、ction This standard only deals with hearing aid immunity, as experience has shown that hearing aids do not emit electromagnetic signals to an extent that can disturb other equipment. Hearing aids are battery-powered devices and therefore disturbances related to a.c. or d.c. power inputs are not rele
25、vant and are not considered. In some cases hearing aids are connected to other equipment by cable, but this standard does not cover common mode transients and common mode surges on such cable connections. Hearing aids whose output is not acoustic, e.g. cochlear implants and bone conduction hearing a
26、ids, are not covered by this standard. Other EMC phenomena, such as electrostatic discharge, are not known to be a significant problem in connection with hearing aids and are therefore not dealt with. Based on new knowledge, they could be considered in connection with future revisions or extensions
27、of this standard. Based on experience in connection with the use of hearing aids, relevant sources of disturbance for hearing aids include high frequency radiated electromagnetic fields originating from digital telephone systems and low frequency radiated magnetic fields which may interact with the
28、telecoil input included in some hearing aids. As the telecoil input is an intended feature of some hearing aids, and the hearing aid therefore must have a certain sensitivity to low frequency magnetic fields, it is not relevant to specify immunity against disturbing low frequency magnetic fields. To
29、 avoid unintended interference from low frequency magnetic noise fields, the recommendations specified in IEC 60118-4, regarding specifications for induction loop systems, should be followed. With regard to high frequency radiated electromagnetic fields originating from digital telephone systems, on
30、ly sources of disturbance which are currently known to be a problem in connection with hearing aids are covered. Reference is made to IEC 61000-4-3 including amendment 1, which covers the frequency range 0,08 GHz to 3 GHz, and identifies digital radio telephone systems operating in the frequency ran
31、ges 0,8 GHz to 0,96 GHz and 1,4 GHz to 2,0 GHz to be potential sources of interference. 1 Scope This part of IEC 60118 covers all relevant EMC phenomena for hearing aids. It specifies measurement methods and acceptance levels for hearing aid immunity to high frequency electromagnetic fields originat
32、ing from digital telephone systems as specified in IEC 61000-4-3. Measurement methods for hearing aids with non-acoustic outputs and for hearing aids connected to other equipment by cables are not given in this standard. For the purpose of this standard, two classes of hearing aids are defined (see
33、3.1) related to their use. Class 2 hearing aids are not covered by this standard, because it has not been possible to establish test field strengths for this class. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provision
34、s of this part of IEC 60118. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 60118 are encouraged to investigate the possibility of applying the most recent editions of the normative d
35、ocuments listed below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60118-0:1983, Hearing aids Part 0: Measurement of electroacoustical characteristics. Amendment 1 (1994) IEC 60118-4:1981, Methods of measurement of electro-acoustical characteristics of h
36、earing aids Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes. Amendment 11) IEC 60118-7:1983, Hearing aids Part 7: Measurement of the performance characteristics of hearing aids for quality inspection for delivery purposes. Amendment 1 (1994) IEC 60126:1973
37、, IEC reference coupler for measurement of hearing aids using earphones coupled to the ear by means of ear inserts. IEC 60711:1981, Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts. 1) To be published. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04
38、:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60118-13:1997 4 BSI 05-1999 IEC 61000-4-3:1995, Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 3: Radiated, radio frequency, electromagnetic field immunity test. Amendment 12) 3 Definitions and abbreviations
39、 For the purpose of this International Standard the following definitions and abbreviations apply in addition to those given in IEC 60118-0, IEC 60118-7, and IEC 61000-4-3. 3.1 Definitions 3.1.1 hearing aid electroacoustical device worn by a person to compensate for a hearing impairment NOTEHearing
40、aids can be placed on the body (BW), behind the ear (BTE) or in the ear (ITE). 3.1.2 class 1 hearing aid hearing aid for use in environments where digital radio equipment is in operation 3.1.3 class 2 hearing aid hearing aid for use together with portable or mobile digital radio equipment on the sam
41、e ear 3.1.4 reference orientation (of a hearing aid) the orientation of the hearing aid with respect to the RF emitting source which corresponds to the orientation of the hearing aid under actual use on a person facing an RF emitting source 3.1.5 input related interference level (IRIL) the level use
42、d to characterize the immunity of the hearing aid. Measured in decibels SPL. Decreasing values of IRIL indicate increasing immunity 3.1.6 overall input related interference level (OIRIL) the level of a broad band signal expressed in decibels SPL based on the frequency dependent audio gain 3.2 Abbrev
43、iations 3.2.1 ASP automatic signal processing 3.2.2 BTE behind the ear. Used to designate hearing aids where the active circuitry is located behind the ear 3.2.3 BW bodyworn. Used to designate hearing aids where the active circuitry is located on the body, typically on the chest 3.2.4 ITE in the ear
44、. Used to designate a hearing aid where the active circuitry is located at the opening of the auditory canal 3.2.5 RF radio frequency. Used in the present context to designate frequencies in the range above 150 kHz 3.2.6 SPL sound pressure level 4 Operation and function of the product Hearing aids b
45、asically consist of a microphone, an amplifier and a small earphone (receiver). The sound is normally fed to the ear canal by means of an individually made ear mould (ear insert). The power source normally used is a small battery. Some adjustments of the controls of the hearing aid are performed by
46、the user, which in some cases is by means of a remote control. 5 Specification of EMC environment Hearing aids are used in all environments. 6 Requirements for immunity 6.1 Performance criterion The IRIL shall not exceed 55 dB SPL. The background for establishing this performance criterion can be fo
47、und in Annex A. 2) To be published. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:19:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60118-13:1997 BSI 05-19995 6.2 Test field strengths The field strengths of RF test signals to establish immunity for class 1 hearing aids have been chosen
48、 from Annex F of IEC 61000-4-3 (as modified by amendment 1), and shall be in accordance with Table 1. Table 1 Field strengths of RF test signals to be used to establish immunity at a stated distance for class 1 hearing aids As sources of disturbance in the frequency range below 0,8 GHz are not known
49、 to affect hearing aids, testing in this frequency range is not considered necessary. For class 1 hearing aids, a distance of 2 m has been chosen for evaluating immunity from handheld terminal equipment. This distance is based on experience with the practical use of hearing aids, the possibility of the user being at this distance from the source of interference, and a comparison between the actual test procedure and practical situations (see Annex A). Currently test field strengths for class 2 hearing aids have not been established due to