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1、BRITISH STANDARD BS EN 60118-0:1993 IEC 118-0: 1983 Incorporating Amendment Nos. 1, 2 and 3 Hearing aids Part 0: Methods for measurement of electroacoustical characteristics The European Standard EN 60118-0:1993 (including EN 60118-0/A1:1994) has the status of a British Standard UDC 534.773.2:621.39
2、5.92:001.4:620.1:621.317.6:534.86 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60118-0:1993 This British Standard, having been prepared under the direction of the Electronic Equipment Standards Committee, was published under the aut
3、hority of the Board of BSI and comes into effect on 3 March 1984 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference EEL/24 Draft for comment 81/24282 DC ISBN 0 580 13793 7 Committees responsible for this British Standard The preparation of this British
4、Standard was entrusted by the Electronic Equipment Standards Committee (EEL/-) to Technical Committee EEL/24 upon which the following bodies were represented: British Radio and Electronic Equipment Manufacturers Association British Telecommunications Department of Health and Social Security Departme
5、nt of Trade and Industry (National Physical Laboratory) Institution of Electronic and Radio Engineers Royal National Institute for the Deaf Society of Hearing Aid Audiologists Limited The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Britis
6、h Medical Association British Society of Audiology Health and Safety Executive Hearing Aid Industry Association Institute of Actuaries Institute of Sound and Vibration Research Manchester Area Health Authority Medical Research Council Ministry of Defence National Coal Board Royal Aeronautical Societ
7、y Amendments issued since publication Amd. No.Date of issueComments 6179October 1990 7836August 1993 8252July 1994Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60118-0:1993 BSI 09-1999i Contents
8、Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Object3 3General conditions3 4Explanation of terms3 5Test equipment5 6Test conditions6 7Measurements7 8Frequency response recording chart12 Appendix A Harmonic and intermodulation distortion14 Annex ZA (normative) O
9、ther international publications quoted in this standard with the references of the relevant European publications15 Figure 1 Examples of the determination of the equivalent input noise level of a hearing aid13 Figure A.1 Quadratic type non-linearity14 Figure A.2 Cubic type non-linearity14 Publicatio
10、ns referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60118-0:1993 ii BSI 09-1999 National foreword This Part of this British Standard has been prepared under the direction of the Electronic Equipment Standard
11、s Committee and is identical with IEC Publication 118-0:1983 “Measurement of electroacoustical characteristics”, and amendment 1:1994, published by the International Electrotechnical Commission (IEC). This standard is also in agreement with Harmonization Document HD 450.0 S1 and EN 60118-0/A1:1994,
12、published by the European Committee for Electrotechnical Standardization (CENELEC). In 1993 the European Committee for Electrotechnical Standardization (CENELEC) accepted IEC 118-0:1983 as European Standard EN 60118-0:1993. As a consequence of implementing the European Standard this British Standard
13、 is renumbered as BS EN 60118-0 and any reference to BS 6083-0 should be read as a reference to BS EN 60118-0. This Part of this standard, together with Parts 1 to 4, supersedes BS 3171:1968, which is withdrawn. BS 6083 consists of the following Parts: Part 0:1984Methods for measurement of electroac
14、oustical characteristics. Part 1:1984Method of measurement of characteristics of hearing aids with induction pick-up coil input. Part 2:1984 Methods of measurement of electroacoustical characteristics of hearing aids with automatic gain control circuits. Part 3:1991Methods of measurement of electroa
15、coustical characteristics of hearing aid equipment not entirely worn on the listener. Part 4:1981Specification for magnetic field strength in audio-frequency induction loops for hearing aid purposes. Part 5:1984Specification for dimensions of the nipple and sealing device for insert earphones. Part
16、6:1985Specification for characteristics of electrical input circuits for hearing aids. Part 7:1985Methods for measurement of performance characteristics of hearing aids for quality inspection on delivery. Part 8:1985Methods for measurement of performance characteristics of hearing aids under simulat
17、ed in situ working conditions. Part 9:1986Method for measurement of characteristics of hearing aids with bone vibrator outputs. Part 10:1988Guide to hearing aid standards. Part 11:1984Specification for symbols and other markings on hearing aids and related equipment. Licensed Copy: sheffieldun sheff
18、ieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60118-0:1993 BSI 09-1999iii Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain convent
19、ions are not identical with those used in British Standards. Additional information. The note to 6.4.4 contains a requirement and for the purposes of this Part of this British Standard it should therefore be regarded as part of the main text. NOTETypographical error. In 7.14, for “decribed” read “de
20、scribed”. A British Standard does not purport to include all the necessary provisions of a 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. Cross-references International
21、StandardsCorresponding British Standards IEC 68BS 2011 Basic environmental testing procedures IEC 118-1:1975BS 6083 Hearing aids Part 1:1981 Method of measurement of characteristics of hearing aids with induction pick-up coil input (Identical) IEC 118-2:1983BS 6083 Hearing aids Part 2:1981 Methods o
22、f measurement of electro-acoustical characteristics of hearing aids with automatic gain control circuits (Identical) IEC 118-7:1983Part 7:1985 Methods for measurement of the performance characteristics of hearing aids for quality inspection on delivery (Identical) IEC 118-8:1983Part 8:1985 Methods f
23、or measurement of the performance characteristics of hearing aids under simulated in situ working conditions (Identical) IEC 126:1973BS 6111:1981 Specification for reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts (Identical) IEC 225:196
24、6BS 2475:1964 Octave and one-third octave band-pass filters (Technically equivalent) IEC 263:1982BS 6397:1983 Specification for scales and sizes for plotting frequency characteristics and polar diagrams (Identical) IEC 711:1981BS 6310:1982 Specification for occluded-ear simulator for the measurement
25、 of earphones coupled to the ear by ear inserts (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 2 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amen
26、dments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontroll
27、ed Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60118-0 January 1993 + A1 February 1994 UDC 534.773.2:621.395.92:001.4:620.1:621.317.6:534.86Supersedes HD 450.0 S1:1984 Descriptors: Hearing aids, measurement, electroacoustic, audiofrequency English version Hearing aids Part 0:
28、Measurement of electroacoustical characteristics (Includes amendment A1:1994) (IEC 118-0:1983) Appareils de correction auditive Partie zro. Mthodes de mesure des caractristiques lectroacoustiques (CEI 118-0:1983) (inclut amendement A1:1994) Hrgerte Teil 0: Messung der elektroakustischen Eigenschafte
29、n (IEC 118-0:1983) (enthlt nderungen A1:1994) This European Standard was approved by CENELEC on 1992-12-09. 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 alt
30、eration. Up-to-date lists and bibliographical references concerning 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
31、translation under the responsibility of a CENELEC member into its 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, I
32、reland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, 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 Stassa
33、rt 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 60118-0:1993 E + A1:1994 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60118-0:1994 BSI 09-1999 2 Foreword At the request of the Technical Board, HD 450.0 S1:
34、1984 (IEC 118-0:1983) was submitted to the CENELEC voting procedure for conversion into a European Standard. The text of the International Standard was approved by CENELEC as EN 60118-0 on 9 December 1992. The following dates were fixed: Annexes designated “normative” are part of the part of the sta
35、ndard. In this standard, Annex ZA is normative. Foreword to Amendment A1 The text of document 29(C)169, as prepared by IEC Technical Committee No. 29: Electroacoustics, was submitted to the IEC-CENELEC parallel vote in April 1992. The reference document was approved by CENELEC as amendment A1 to EN
36、60118-0 on 9 March 1993. The following dates were fixed: latest date of publication of an identical national standard(dop) 1993-12-01 latest date of withdrawal of conflicting national standards(dow) latest date of publication of an identical national standard(dop) 1995-01-01 latest date of withdrawa
37、l of conflicting national standards(dow) 1995-01-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:14:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60118-0:1994 BSI 09-19993 1 Scope This standard describes the measurement of physical performance characteristics of airconduction hearing
38、 aids based on a free-field technique and measured with an ear simulator. 2 Object 2.1 The object of this standard is to describe methods of measurement for the evaluation of the electroacoustical characteristics of hearing aids. The methods are chosen first of all to be practical and reproducible,
39、and consequently they are based on fixed parameters chosen, to a certain extent, arbitrarily. This should be taken into consideration when comparisons are being made between test results for hearing aids of different models and manufacture, and in each case it is advisable to examine to what extent
40、the arbitrarily chosen parameters will influence the comparison of such test results. 2.2 The test results obtained by the methods specified in this standard express the performance under the conditions of the test and may deviate substantially from the performance of the hearing aid under practical
41、 conditions of use. 2.3 It is not the purpose of this standard to restrict the variety of hearing aid performance and characteristics available, nor to inhibit in any way advances in the state of the art. 2.4 The most significant change in this standard is the use of an ear simulator in accordance w
42、ith IEC Publication 711: Occluded-ear Simulator for the Measurement of Earphones Coupled to the Ear by Ear Inserts, rather than an acoustic coupler, IEC Publication 126: IEC Reference Coupler for the Measurement of Hearing Aids Using Earphones Coupled to the Ear by Means of Ear Inserts. The effect o
43、f this change will be to give an apparent significant increase, at some frequencies, of both gain and saturation output levels over the results obtained when measurements are made with the acoustic coupler. Results obtained by using the methods described in this standard cannot therefore be directly
44、 compared with those previously obtained using the first edition of IEC Publication 118: Recommended Methods for Measurement of the Electroacoustical Characteristics of Hearing Aids, or IEC Publication 118-7: Hearing Aids, Part 7: Measurement of Performance Characteristics of Hearing Aids for Qualit
45、y Inspection for Delivery Purposes, or IEC Publication 118-8: Methods of Measurement of Performance Characteristics of Hearing Aids under Simulated in situ Working Conditions. (In preparation.) 3 General conditions 3.1 Throughout this standard all sound pressure levels specified are referred to 20 4
46、Pa. When appropriate, sound pressure level will be abbreviated to SPL. 3.2 Reference is made to IEC Publication 711 (1981): Occluded Ear Simulator for the Measurement of Earphones Coupled to the Ear by Ear Inserts. 3.3 Test results obtained by the substitution method using point-by-point measurement
47、 shall be considered basic and should be used as a reference when results from the comparison method and the pressure method are being interpreted (see Sub-clauses 4.2, 4.3 and 4.4). 4 Explanation of terms 4.1 Ear simulator An ear simulator is a device for measuring the output sound pressure of an e
48、arphone under well-defined loading conditions in a specified frequency range. It consists essentially of a cavity of specified volume, acoustic load networks, and a calibrated microphone. The location of the microphone is chosen so that the sound pressure at the microphone corresponds approximately
49、to the sound pressure generated at the human eardrum (see IEC Publication 711). 4.2 Substitution method A method of measurement in which the hearing aid and the microphone employed to measure the free-field sound pressure are placed alternatively at the same point in the sound field. 4.3 Comparison method A method of measurement in which the hearing aid and the microphone employed to measure the free-field sound pressure, are placed simultaneously at two acoustically equivalent points in the sound field. 4.4 Pressure method A method of measurement