1、 IEC 60318-6Edition 1.0 2007-11INTERNATIONAL STANDARD NORME INTERNATIONALEElectroacoustics Simulators of human head and ear Part 6: Mechanical coupler for the measurement of bone vibrators Electroacoustique Simulateurs de tte et doreille humaines Partie 6: Coupleur mcanique destin la mesure des ossi
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16、itez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60318-6Edition 1.0 2007-11INTERNATIONAL STANDARD NORME INTERNATIONALEElectroacoustics Simulators of human head and ear Part 6: Mechanical coupler for the measurement of bone vibrators E
17、lectroacoustique Simulateurs de tte et doreille humaines Partie 6: Coupleur mcanique destin la mesure des ossivibrateurs INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE PICS 17.140.50 PRICE CODECODE PRIXISBN 2-8318-9470-0 2 60318-6 IEC:2007 CONTENTS FOREWORD.3 1
18、Scope.5 2 Normative reference .5 3 Terms and definitions .5 4 Construction.6 4.1 General .6 4.2 Mechanical impedance level7 4.3 Phase angle of mechanical impedance8 4.4 External geometry .8 5 Calibration8 5.1 Reference environmental conditions8 5.2 Calibration procedure 8 5.3 Force sensitivity level
19、8 5.4 Mechanical impedance level9 5.5 Temperature dependence9 6 Marking and instruction manual 9 6.1 Marking of the mechanical coupler 9 6.2 Instruction manual.9 7 Coupling of bone vibrator to the mechanical coupler.9 8 Maximum permitted expanded uncertainty of measurements 10 Annex A (informative)
20、Example of a specific construction of a mechanical coupler.11 Annex B (informative) Guidance on the testing and calibration of mechanical couplers 14 Bibliography15 Figure A.1 Dimensions of mechanical impedance element base.12 Figure A.2 Dimensions of tungsten loading insert.12 Figure A.3 Assembly o
21、f the mechanical coupler .13 Table 1 Mechanical impedance level7 Table 2 Values of Umaxfor basic measurements 10 60318-6 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROACOUSTICS SIMULATORS OF HUMAN HEAD AND EAR Part 6: Mechanical coupler for the measurement of bone vibrators FOREWORD
22、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 concerning standardization in the electric
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28、d regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in co
29、nformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for
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31、ative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention 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 respo
32、nsible for identifying any or all such patent rights. International Standard IEC 60318-6 has been prepared by IEC technical committee 29: Electroacoustics. This standard cancels and replaces IEC 60373 published in 1990. This first edition constitutes a technical revision. The text of this standard i
33、s based on the following documents: CDV Report on voting 29/615/CDV 29/628A/RVCFull information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. A list of all parts of the IEC 60318 series under the general title: Electroacoustics Sim
34、ulators of human head and ear, can be found on the IEC website. 4 60318-6 IEC:2007 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on
35、 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. 60318-6 IEC:2007 5 ELECTROACOUSTICS SIMULATORS OF HUMAN HEAD AND EAR Part 6: Mechanical coupler fo
36、r the measurement of bone vibrators 1 Scope This part of IEC 60318 describes a mechanical coupler for the measurement of the output force of bone vibrators. The mechanical impedance of the coupler is specified in the frequency range 125 Hz to 8 000 Hz. The coupler is intended for calibration of audi
37、ometers using bone vibrators having a plane circular tip area of 175 mm 25 mm and for determining the performance of bone conduction hearing aids. The vibratory force developed by a bone vibrator is not, in general, the same on the coupler as on a persons mastoid. However, the IEC recommends its use
38、 as a means for the calibration of specified vibrators used in audiometry and for the exchange of specifications and of data on bone conduction hearing aids. NOTE Some bone vibrators of hearing aids and some non-standardised bone vibrators still used in audiometry have a curved surface. Users should
39、 be aware that those vibrators in general will not be loaded on the mechanical coupler with the same mechanical impedance as the one specified in Table 1 of this standard. 2 Normative reference The following referenced document is indispensable for the application of this document. For dated referen
40、ces, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BIPM, IEC, ISO, IFCC, IUPAC, IUPAP and OIML:1995, Guide to the expression of uncertainty in measurement (GUM) 3 Terms and definitions For the purposes of thi
41、s document, the following terms and definitions apply. 3.1 bone-conduction vibrator bone vibrator electro-mechanical transducer that transforms electric oscillations into mechanical vibrations and is intended to be coupled to the bony structure of the head, most commonly the mastoid apophysis 3.2 me
42、chanical coupler device for calibrating bone-conduction vibrators designed to present a specified mechanical impedance to a vibrator applied with a specified static force, and equipped with an electromechanical transducer to enable the vibratory force level at the surface of contact between vibrator
43、 and mechanical coupler to be determined 3.3 alternating force level ten times the logarithm to the base 10 of the ratio of the squared r.m.s. value of the alternating force transmitting the vibration to the square of the reference value of one micronewton 6 60318-6 IEC:2007 NOTE 1 The unit of the l
44、evel re 1N is decibel (dB). NOTE 2 The alternating force level is also called force level. 3.4 mechanical impedance for a sinusoidal signal, the complex quotient of the alternating force transmitting the vibration by the component of velocity of the object in the direction of the force NOTE The unit
45、 is newton second per meter (Ns/m). 3.5 mechanical impedance level ten times the logarithm to the base 10 of the ratio of the squared absolute value (modulus) of the mechanical impedance to the square of the reference value of one newton second per meter (Ns/m) NOTE The unit of the level re 1 Ns/m i
46、s decibel (dB). 3.6 mechanical resistance real part of the mechanical impedance NOTE The unit is newton second per meter (Ns/m). 3.7 mechanical reactance imaginary part of the mechanical impedance NOTE The unit is newton second per meter (Ns/m). 3.8 force sensitivity quotient of output voltage of th
47、e mechanical coupler by the applied alternating force NOTE The unit is volt per newton (V/N). 3.9 force sensitivity level ten times the logarithm to the base 10 of the ratio of the squared force sensitivity to the square of the reference force sensitivity of one volt per newton (V/N) NOTE The unit o
48、f the level re 1 V/N is decibel (dB). 4 Construction 4.1 General The mechanical coupler shall consist of a rigid mass of approximately 3,5 kg containing a force-sensing element which is surmounted by visco-elastic material having an external profile as specified in 4.4. The mechanical impedance of t
49、he assembly for uniaxial vibration which is coincident with its major axis of symmetry shall comply with the specifications in 4.2 and 4.3. The whole assembly shall be supported in such a way as to be capable of sustaining a static force of up to 6 N (including the weight of the vibrator under test, if mounted on a vertical axis) with a frequency of natural oscillation on the supports not greater t
