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1、BRITISH STANDARD BS EN 60118-13:2005 Electroacoustics Hearing aids Part 13: Electromagnetic compatibility (EMC) The European Standard EN 60118-13:2005 has the status of a British Standard ICS 17.140.50; 33.100.20 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncon
2、trolled Copy, (c) BSI BS EN 60118-13:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 25 October 2005 BSI 25 October 2005 ISBN 0 580 46515 2 National foreword This British Standard is the official English language version of EN 60118-13:2
3、005. It is identical with IEC 60118-13:2004. It supersedes BS EN 60118-13:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee EPL/29, Electro-acoustics, which has the responsibility to: A list of organizations represented on this committee can be obt
4、ained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility
5、 of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. a
6、id enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This
7、document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldu
8、n, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60118-13 NORME EUROPENNE EUROPISCHE NORM June 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normu
9、ng Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60118-13:2005 E ICS 17.140.50; 33.100.20 Supersedes EN 60118-13:1997 English version Electroacoustics Hearing aids
10、Part 13: Electromagnetic compatibility (EMC) (IEC 60118-13:2004) Electroacoustique Appareils de correction auditive Partie 13: Compatibilit lectromagntique (CEM) (CEI 60118-13:2004) Akustik Hrgerte Teil 13: Elektromagnetische Vertrglichkeit (EMV) (IEC 60118-13:2004) This European Standard was approv
11、ed by CENELEC on 2005-02-01. 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 concerning such nation
12、al 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 own language
13、and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
14、embourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 29/561/FDIS, future edition 2 of IEC 6011
15、8-13, prepared by IEC TC 29, Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60118-13 on 2005-02-01. This European Standard supsersedes EN 60118-13:1997. It introduces a new set of requirements for use of hearing aids with mobile phones. The followi
16、ng dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-02-01 This European Standar
17、d has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive(s) 93/42/EEC. See Annex ZZ. Annexes ZA and ZZ have been added by CENELEC. _ Endorsement notice The text of the International Stand
18、ard IEC 60118-13:2004 was approved by CENELEC as a European Standard without any modification. _ EN 60118-13:2005 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 CONTENTS 1 Scope.4 2 Normative references .4 3 Terms and definitions .5 4 O
19、peration and function of the product.6 5 Specification of EMC environment 6 6 Requirements for immunity.6 7 Immunity test procedures .7 8 Measurement uncertainty .10 Annex A (informative) Background for establishing test methods, performance criteria and test levels 11 Bibliography17 Annex ZA (norma
20、tive) Normative references to international publications with their corresponding European publications.18 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives19 Figure 1 Example of test arrangement for hearing aid immunity measurements using GTEM cell.8 Figure 2 Examples of in
21、put-output response curves at 1 000 Hz and the determination of gain at an input level of 55 dB.9 Figure 3 Examples of determination of IRIL by electromagnetic immunity (EMI) testing 10 Figure A.1 Ratio of 1 to 2 between field strength and interference level (dB)12 Figure A.2 Example of test arrange
22、ment for hearing aid immunity measurements using dipole antenna.15 Figure A.3 Mobile phone antenna designs16 Table 1 Field strengths of RF test signals to be used to establish immunity for bystander and user compatible hearing aids .6 EN 60118-13:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon
23、Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 ELECTROACOUSTICS HEARING AIDS Part 13: Electromagnetic compatibility (EMC) 1 Scope This part of IEC 60118 covers all relevant EMC phenomena for hearing aids. EMC phenomena, such as RF emission and electrostatic discharge, are not currently
24、 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 of this standard. Hearing aid immunity to high frequency electromagnetic fields originating from wir
25、eless telephone systems is currently identified as the only relevant EMC phenomena regarding hearing aids. IEC 61000-4-3 is the basis for relevant EMC tests to be conducted on hearing aids. Measurement methods and acceptance levels are described in this standard. For the purpose of this part of IEC
26、60118, two immunity classes of hearing aids are defined (see 3.1) related to their use. “Bystander compatible“ is defined as a situation, which ensures that a hearing aid is usable in environments where digital wireless devices are in operation in the proximity of the hearing aid wearer. “User compa
27、tible“ hearing aids will ensure that a hearing aid is usable when the hearing aid wearer is using a digital wireless device at the wearers own aided ear. Measurement methods for hearing aids with non-acoustic outputs and for hearing aids connected to other equipment by cables are not given in this s
28、tandard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60118-0, Hear
29、ing aids Part 0: Measurement of electroacoustical characteristics IEC 60118-2, Hearing aids Part 2: Hearing aids with automatic gain control circuits IEC 60118-7, Hearing aids Part 7: Measurement of the performance characteristics of hearing aids for quality inspection for delivery purposes IEC 6012
30、6, IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts IEC 61000-4-3, Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic field immunity test EN 60118-13:2004 Lice
31、nsed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 IEC 61000-4-20, Electromagnetic compatibility (EMC) Part 4-20: Testing and measurement techniques Emission and immunity testing in transverse electromagnetic (TEM) waveguides 3 Terms and definiti
32、ons For the purposes of this part of IEC 60118, the definitions given in IEC 60118-0, IEC 60118-7, and IEC 61000-4-3 as well as the following apply. 3.1 hearing aid wearable instrument intended to aid a person with impaired hearing, usually consisting of a microphone, amplifier and earphone, powered
33、 by a low-voltage battery NOTE Hearing aids can be placed on the body (BW), behind the ear (BTE) or in the ear (ITE). 3.2 bystander compatibility immunity of a hearing aid that ensures it is usable in environments where digital wireless devices are in operation in the proximity of the hearing aid we
34、arer (2 m, see Clause A.4) 3.3 user compatibility immunity of hearing aid that ensures that a hearing aid is usable when the hearing aid wearer is using a digital wireless device at the wearers own aided ear 3.4 reference orientation (of a hearing aid) orientation of the hearing aid with respect to
35、the RF emitting source which corresponds to the orientation of the hearing aid under actual use on a person facing an RF emitting source NOTE RF exposure in the 2 orthogonal axes corresponding to the hearing aid under actual use is found to be suitable for hearing aid immunity testing (see Annex A).
36、 3.5 input related interference level (IRIL) level used to characterise the immunity of the hearing aid NOTE Acoustic IRIL is expressed relative to 20Pa in decibels, and is calculated by subtracting the gain of the hearing aid from the level of 1 kHz signal measured at the output of the hearing aid
37、during exposure to a 1 kHz modulated RF field in microphone mode. The gain of the hearing aid is determined at 1 kHz using an input sound pressure level of 55 dB. If the hearing aid provides an additional directional microphone, the gain determined with the omnidirectional microphone is used for det
38、ermination of IRIL. If the hearing aid provides a telecoil, the control settings used for acoustic measurement are used. Telecoil IRIL is expressed as equivalent acoustic input r.m.s levels re 20 Pa in decibels, based on the assumption that the magnetic field strength level re 1A/m of 20 dB is pract
39、ically equivalent to the acoustic sound pressure level of 70 dB. The telecoil IRIL is calculated by subtracting the output of the hearing aid3) in dB minus 55 dB, from the level of 1 kHz signal measured at the output of the hearing aid during exposure to a 1 kHz modulated RF field in telecoil mode.
40、Decreasing values of IRIL indicate increasing immunity. _ 3) Determined at 35 dB input level re 1A/m at 1kHz. EN 60118-13:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 4 Operation and function of the product Hearing aids basically c
41、onsist of a microphone, an amplifier and a small earphone (receiver). For behind the ear (BTE) hearing aids the sound is normally fed to the ear canal by means of an individually made ear mould (ear insert). In the ear (ITE) hearing aids have the active circuitry located in the auditory canal. The p
42、ower source normally used is a small battery. On some hearing aids, the user can perform some adjustments of the controls of the hearing aid, which in some cases is by means of a remote control. 5 Specification of EMC environment Hearing aids are used in all environments as outlined in IEC 61000-4-3
43、. 6 Requirements for immunity Table 1 states the field strengths of RF test signals to establish immunity for bystander and user compatible hearing aids. Bystander compatibility shall be fulfilled as a minimum specification, whereas user compatibility is an additional feature, which could be claimed
44、 if the specifications are met by the hearing aid. Table 1 Field strengths of RF test signals to be used to establish immunity for bystander and user compatible hearing aids Bystander compatibility IRIL 55 dB for field strengths, E in V/m User compatibility IRIL 55 dB for field strengths, E in V/m F
45、requency range GHz 0,08-0,8 0,8- 0,96 0,96-1,4 1,4- 2,0 2,0-3,0 0,08-0,8 0,8-0,96 0,96-1,4 1,4-2,0 2,0-3,0 Microphone mode Under consider- ation 3 Under consider- ation 2 Under consider- ation Under consider- ation 75 Under consider- ation 50 Under consider- ation Telecoil modea Under consider- atio
46、n 3 Under consider- ation 2 Under consider- ation Under consider- ation Under consider- ation Under consider- ation Under consider- ation Under consider- ation Directional microphone modea Under consider- ation 3 Under consider- ation 2 Under consider- ation Not relevant Not relevant Not relevant No
47、t relevant Not relevant Test field strengths are given as unmodulated carrier levels. a If provided by hearing aid. As sources of disturbance in the frequency range below 0,8 GHz are not known to affect hearing aids, testing in this frequency range is not considered necessary. Requirements for user
48、compatibility in telecoil mode is under consideration, as wireless phones currently do not normally provide inductive coupling. If the hearing aid provides an additional microphone input option directional microphone user compatibility is not considered relevant in this position. Bystander compatibi
49、lity in telecoil mode is considered important to establish interference free EN 60118-13:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:18:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 7 conditions in induction loop environments, and to ensure the ability to use the telecoil as input transducer for assistive listening devices for mobil