1、 IEC 60118-0 Edition 3.0 2015-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Electroacoustics Hearing aids Part 0: Measurement of the performance characteristics of hearing aids lectroacoustique Appareils de correction auditive Partie 0: Mesure des caractristiques fonctionnelles des appareils de cor
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20、erformance characteristics of hearing aids lectroacoustique Appareils de correction auditive Partie 0: Mesure des caractristiques fonctionnelles des appareils de correction auditive INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 17.140.50 ISBN 978-2-8322-269
21、2-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un
22、 distributeur agr. 2 IEC 60118-0:2015 IEC 2015 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references. 7 3 Terms and definitions 8 4 General conditions . 12 4.1 Acoustic test method . 12 4.2 Acoustic coupler 13 4.3 Measurement frequency range 13 4.4 Reporting of data 13 5 Test enclosure and test equ
23、ipment . 13 5.1 General . 13 5.2 Unwanted stimuli in the test enclosure . 13 5.3 Sound source 13 5.4 Measurement system for the measurement of the sound pressure level and harmonic distortion produced by a hearing aid . 14 5.5 Direct-current measuring system . 14 5.6 Magnetic field source for ETLS a
24、nd MASL measurements 15 6 Test conditions 15 6.1 General . 15 6.2 Control of the sound field 16 6.3 Measurement configuration for directional hearing aids 17 6.4 Normal operating conditions for a hearing aid 18 6.4.1 General . 18 6.4.2 Battery or supply voltage 18 6.4.3 Settings of controls 19 6.4.4
25、 Ambient conditions . 19 6.4.5 Sound outlet system . 19 6.4.6 Accessories . 20 7 Test procedures 20 7.1 Frequency response curves . 20 7.2 OSPL90 frequency response curve 20 7.3 Full-on gain response curve 21 7.4 Basic frequency response curve 21 7.4.1 Test procedure . 21 7.4.2 Frequency range 22 7.
26、4.3 Reference test gain (RTG) . 23 7.5 Total harmonic distortion . 23 7.6 Equivalent input noise . 23 7.7 Battery current 23 7.8 Measurements for hearing aids having induction pick-up coil 24 7.8.1 General . 24 7.8.2 Equivalent test loop sensitivity (ETLS) 24 7.8.3 Maximum HFA magneto-acoustical sen
27、sitivity level (HFA MASL) of induction pick-up coil 24 8 Characteristics of electrical input circuits for hearing aids . 24 8.1 Electrical characteristics 24 8.1.1 General . 24 IEC 60118-0:2015 IEC 2015 3 8.1.2 Input impedance 25 8.1.3 Input sensitivity 25 8.2 Mechanical characteristics and electric
28、al function of connector system for electrical input. 25 9 Additional optional test procedures 25 9.1 General . 25 9.2 Effects of tone control and gain control 25 9.2.1 Basic frequency response: effect of tone control . 25 9.2.2 Frequency response: effect of gain control position . 25 9.2.3 Characte
29、ristics of the gain control 26 9.3 Intermodulation distortion 26 9.4 Effects of variation of battery or supply voltage and internal resistance 26 9.4.1 Full-on gain 26 9.4.2 OSPL90 . 27 9.4.3 Total harmonic distortion 27 9.4.4 Total intermodulation distortion 27 9.5 Equivalent input noise in one-thi
30、rd-octave bands . 27 9.6 Additional measurements for hearing aids having induction pick-up coil 30 9.6.1 General . 30 9.6.2 Basic frequency response 30 9.6.3 Frequency response with full-on gain control setting . 30 9.6.4 Effect of gain control position on frequency response 30 9.6.5 Harmonic distor
31、tion 31 9.7 Additional measurements for hearing aids having induction pick-up coil for use with a telephone . 31 9.7.1 General . 31 9.7.2 SPLITS response curve 32 9.7.3 HFA-SPLITS 32 9.7.4 Relative simulated equivalent telephone sensitivity (RSETS). 32 9.8 Additional measurements applying to AGC hea
32、ring aids . 33 9.8.1 General . 33 9.8.2 Steady-state input-output characteristics 33 9.8.3 Dynamic AGC characteristics (attack and release time) 34 9.9 Additional optional measurements with ear simulator, according to IEC 60318-4 34 9.9.1 General . 34 9.9.2 Output sound pressure level frequency resp
33、onse curve for an input sound pressure level of 90 dB 34 9.9.3 Full-on gain response curve . 34 9.9.4 Basic frequency response curve . 34 9.9.5 Presentation of data . 34 10 Maximum permitted expanded uncertainty of measurements . 34 Bibliography . 36 Figure 1 Example of test arrangement for behind-t
34、he-ear hearing aid 16 Figure 2 Example of test arrangement for in-the-ear hearing aid . 17 Figure 3 Example of test arrangement for directional hearing aid 18 Figure 4 Example of OSPL90 curve and basic frequency response curve 21 4 IEC 60118-0:2015 IEC 2015 Figure 5 Example of determination of frequ
35、ency range from basic frequency response curve . 22 Figure 6 Example of hearing aid acoustic gain 28 Figure 7 Example of hearing aid output noise and test equipment noise 29 Figure 8 Hearing aid equivalent input noise and ambient noise . 29 Figure 9 Telephone magnetic field simulator (TMFS) 31 Figur
36、e 10 Example of hearing aids on TMFS for SPLITS test 32 Figure 11 Example of a steady-state input-output characteristic 33 Table 1 Resistors and open circuit voltages for zinc-air battery simulators . 19 Table 2 Distortion test frequencies and input sound pressure levels 23 Table 3 Values of U maxfo
37、r basic measurements 35 IEC 60118-0:2015 IEC 2015 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROACOUSTICS HEARING AIDS Part 0: Measurement of the performance characteristics of hearing aids FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standar
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47、rawn to the Normative 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 n
48、ot be held responsible for identifying any or all such patent rights. International Standard IEC 60118-0 has been prepared by IEC technical committee 29: Electroacoustics. This third edition cancels and replaces the second edition published in 1983 and its Amendment 1:1994 as well as IEC 60118-1:199
49、5, Amendment 1:1998, IEC 60118-2:1983, Amendment 1:1993, Amendment 2:1997 and IEC 60118-6:1999. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the use of an acoustic coupler according to IEC 60318-5; b) the addition of measurements for automatic gain control circuits, for induction pick-up coil inputs and for elect
