1、BRITISH STANDARD Microphones and earphones for speech communications The European Standard EN 61842:2002 has the status ofa British Standard ICs 33.160.50; 17.140.50 BS EN 61842:2002 WkNb A%“ U- rn% E rn NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW $ present to the responsi
2、ble 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 subcommittee can be obtained on
3、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 oftime during the change over from one numbering system to the other, publications may contain identifiers from b
4、oth system. Cros s-r e ferenc es 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”faci1ity ofthe BSI Electroni
5、c Catalogue or ofBritish Stan dards 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 ofitself confer immunity from legal obligations. Summary of pages This d
6、ocument comprises a front cover, an inside front cover, the EN title page, pages 2 to 30, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 9 July 2002 ISBN O 580 39989 3 EUROPEAN STANDARD NORME EUROP .ENNE EUR
7、OPfISCHE NORM EN 61842 June 2002 ICs 33.160.50; 17.140.50 English version Microphones and earphones for speech communications (IEC 61 842:2002) Microphones et couteurs pour com m u n ications vocales (CE1 61 842:2002) Mikrofone und Kopfh- rer f r Sprach kom mu n i kation (IEC 61842:2002) This Europe
8、an Standard was approved by CENELEC on 2002-05-01. CENELEC members are bound to comply with the CENKENELEC 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 c
9、oncerning 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 i
10、nto its own language and notified to the Central Secretariat has the same status as the oficial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlan
11、ds, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique EuropYkches Komitee f, r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 2002 CE
12、NELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61842:2002 E Page 2 EN 61842:2002 Foreword The text of document 100/450/FDIS, future edition 1 of IEC 61842, prepared by IEC TC 100, Audio, video and multimedia systems and equipment,
13、was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61842 on 2002-05-01. The following 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 latest date by which the nation
14、al standards conflicting with the EN have to be withdrawn (dop) 2003-02-01 (dow) 2005-05-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A and B are informativ
15、e. Annex ZA has been added by CENELEC. En dorse ment not i ce The text of the International Standard IEC 61842:2002 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 6
16、0268-2 NOTE Harmonized as HD 483.2 S2:1993 (not modified). O BSI 9 July 2002 Page 3 EN 61842:2002 CONTENTS 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 3.1 Classification 4 3.2 Devices for measurement 6 3.3 Characteristics and perfor 6 Characteristics and measuring procedures .
17、 7 4.1 General conditions 7 4.2 Rated conditions . 8 4.3 Measuring conditions . 9 4.4 Microphones for speech communications 11 4.5 Earphones for speech communications . 13 5 Connectors and contact designation 5.1 Miniature 4-position connector 5.2 Concentric connector 6 Endurance of insulation 15 7
18、Characteristics to be specified 15 Annex A (informative) Miniature 4-position connector . 25 Annex B (informative) Sub-miniature 2,5 mm concentric connector with three contacts 27 Annex ZA (normative) Normative references to international publications with their corresponding European publications 2
19、8 Bibliography 30 . 4 Figure 1 - Artificial ear for ordinary earphones . 18 Figure 2 - Example of the case for microphone unit measurement 18 Figure 3 - Example of the case for earphone unit measurement . 19 Figure 4 - Determination of the artificial mouth position from the earcap reference point Fi
20、gure 5 - Calibration system diagram for output sound pressure from artificial mouth 20 Figure 6 - Measuring system diagram for microphone unit sensitivity . 21 Figure 7 - Diagram of listening test for normal operation of microphone . 22 Figure 8 - Measuring system diagram for earphone sensitivity 23
21、 Figure 9 - Diagram of listening test for normal operation of earphone 24 Figure 10 - Connection designation for plug of miniature 4-position connector 24 Figure A.l - Shape and basic dimensions of plug for miniature 4-position connector 25 Figure A.2 - Shape of plug interface part of jack for minia
22、ture 4-position connector 26 Figure B.l - 2,5 mm pin concentric connector (plug) with three contacts (tip, ring and sleeve) 27 Table 1 - Definitions of earphone, headphone, earset and headset 16 Table 2 - Characteristics of microphones for speech communication to be specified and classification 16 T
23、able 3 - Characteristics of earphones for speech communication to be specified and classification 17 . O BSI 9 July 2002 Page 4 EN 61842:2002 MICROPHONES AND EARPHONES FOR SPEECH COMMUNICATIONS 1 Scope This standard applies to the microphone part and earphone part of handsets, headsets or earsets fo
24、r speech communications, and also to the microphone units and earphone units of built-in handsets, headsets or earsets. The object of this standard is to establish definitions relating to these electroacoustic transducers, and to standardize the characteristics to be specified and the relevant metho
25、ds of measurement. This does not exclude the use of other methods of measurement which can be shown to give the same or more reliable results. 2 Normative references The following reference documents are indispensable for the application of this document. For dated references, only the edition cited
26、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60268-1:1985, Sound sysfem equipmenf - Parf 1: General IEC 60268-4, Sound sysfem equipmenf - Parf 4: Microphones IEC 60268-7, Sound sysfem equipmenf - Parf 7: Headphones and earpho
27、nes IEC 6031 8-1, Elecfroacousfics - Simulafors of human head and ear - Parf 1: Ear simulafor for fhe calibrafion of supra-aural earphones IEC 60603-11:1992, Connecfors for frequencies below 3 MHz for use wifh prinfed boards - Parf 1 1: Defail specificafion for concenfric connecfors (dimensions for
28、free connecfors and fixed connecfors) IEC 6071 1, Occluded-ear simulafor for fhe measuremenf of earphones coupled fo fhe ear by ear inserfs IEC 61 094-1, Measuremenf microphones - Parf 1: Specificafions for laborafory sfandard microphones I EC 61 094-4, Measuremenf microphones - Parf 4: Specificafio
29、ns for working sfandard microphones ITU-T P.51, Arfificial moufh ITU-T P.370, Coupling hearing aids fo felephone sefs 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 Classifi cat ion 3.1.1 handset assembly for speech communicati
30、ons, which is a handle including a microphone part and an earphone part suitable to be held by the talkers hand O BSI 9 July 2002 Page 5 EN 61842:2002 3.1.2 headset assembly for speech communications, which consists of a holder to put on the talkers head, one or two earphone parts and a microphone p
31、art, so as to keep the talkers hands free 3.1.3 earset assembly for speech communications, which consists of an earphone part and a microphone part, so as to keep the talkers hands free, without a holder to put on the talkers head NOTE The distinction between an earset and a headset is as complicate
32、d as it is between an earphone and a headphone. Table 1 explains the definitions of earphone, headphone, earset and headset used in this standard. 3.1.4 microphone for speech communications: a) part of a handset, an earset or a headset, which functions as a microphone (an acousto- electrical transdu
33、cer) b) assembly of a microphone unit for speech communications and a case for measurement purposes, including acoustical circuit elements so as to obtain practical frequency characteristics NOTE 1 A microphone for speech communications is understood to include devices, if any, such as amplifiers or
34、 impedance matching transformers up to the output terminals. NOTE 2 A microphone for speech communications is called merely “microphone“, or “microphone part“ of a handset, of an earset or of a headset, in Clause 4 of this standard and beyond. 3.1.5 earphone for speech communications a) part of a ha
35、ndset, an earset or a headset, which functions as an earphone (an electro- acoustic t ra nsd u Cer) b) assembly of an earphone unit for speech communications and a case for measurement purposes, including acoustical circuit elements so as to obtain practical frequency character ist ics NOTE 1 Any co
36、mponent which is intended by the manufacturer as an integral part of the earphone is included during measurements. NOTE 2 An earphone for speech communications is called merely “earphone“, or “earphone part“ of a handset, of an earset or of a headset, in Clause 4 of this standard and beyond. 3.1.6 m
37、icrophone unit for speech communications acousto-electrical transducer installed in a handset, in an earset or in a headset to pick up the talkers speech in the vicinity of hidher mouth NOTE The microphone unit for speech communications is called merely a “microphone unit“ in Clause 4 of this standa
38、rd and beyond. 3.1.7 earphone unit for speech communications electroacoustic transducer installed in a handset, in an earset or in a headset to radiate sound signal in the vicinity of the listeners ear NOTE The earphone unit for speech communications is called merely an “earphone unit“ in Clause 4 o
39、f this standard and beyond. 3.1.8 case for unit measurement case in which a microphone unit or an earphone unit for speech communications is installed for measurement. It includes additional acoustic circuit elements so as to obtain practical frequency characteristics, if necessary O BSI 9 July 2002
40、 Page 6 EN 61842:2002 3.2 Devices for measurement 3.2.1 mou th pi ece hol es holes bored into the front of the enclosure of a microphone unit for speech communications, to receive the input sound 3.2.2 earcap ho I es holes bored into the front of the enclosure of an earphone for speech communication
41、s, to radiate the output sound 3.2.3 artificial mouth sound source for microphone measurement, which can produce the sound field similar to that around an ordinary human mouth 3.2.4 artificial ear acoustic load for earphone measurement, whose acoustic impedance is similar to that of an ordinary huma
42、n ear. It includes a microphone for measurement 3.2.5 lip ring circular ring placed in front of the sound outlet of an artificial mouth for localizing the equivalent lip position 3.2.6 lip plane outer plane of the lip ring, giving the reference point for finding the measuring position 3.2.7 external
43、 d.c. power supply d.c. power supply for a microphone for speech communications including an amplifier or an electrical impedance converter circuit 3.2.8 add i ti o na1 res is tance electrical resistance for the earphone for speech communications which requires an external resistance for necessary a
44、djustment of characteristics of the device 3.2.9 probe coil coil for measurement of the external magnetic field of an earphone for speech communications 3.3 Characteristics and performance 3.3.1 sensitivity (V/Pa) absolute value of the ratio between the open-circuit output voltage from a microphone
45、for speech communications placed at a specified point in the sound field produced by the artificial mouth and the sound pressure in the undisturbed free field at a specified calibration point, the signal frequency being the reference frequency NOTE Though the specified point for the microphone and t
46、he sound pressure calibration point should be identical in general, these points may be different according to this Standard. O BSI 9 July 2002 Page 7 EN 61842:2002 3.3.2 sensitivity level (dB) twenty times the logarithm to base ten of the sensitivity divided by the reference sensitivity (1 V/Pa) 3.
47、3.3 sensitivity to voltage (Pa/V) absolute value of the ratio between the sound pressure produced by an earphone for speech communications in the artificial ear and the voltage supplied to the earphone, the signal frequency being the reference frequency 3.3.4 sensitivity level to voltage (dB) twenty
48、 times the logarithm with a base of ten of the sensitivity divided by the reference sensitivity (20 yPa/V) 3.3.5 sensitivity to power (Pa2/W) absolute value of the ratio between mean square of the sound pressure produced by an earphone for speech communications in the artificial ear and the electric
49、al power supplied to the earphone, the signal frequency being the reference frequency 3.3.6 sensitivity level to power (dB) ten times the logarithm with a base of ten of the sensitivity to power divided by the reference sensitivity (4 x IO- Pa2/W) 3.3.7 electrical impedance ( ) absolute value of the internal impedance measured at the output terminals of a microphone for speech communications or the input terminals of an earphone for speech communications NOTE The word “electrical” is added in this Standard to distinguish the electrical impedance from the aco
