BSI 19/30405107 DC:2019 Edition
$13.70
BS EN IEC 60118-0. Electroacoustics. Hearing aids – Part 0. Measurement of the performance characteristics of hearing aids
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 58 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 8 | FOREWORD |
| 10 | 1 Scope |
| 11 | 2 Normative references 3 Terms and definitions |
| 16 | 4 General conditions 4.1 Acoustic test method 4.2 Acoustic couplers and ear simulator |
| 18 | 4.3 Test signals and frequency range 4.4 Reporting of data 4.4.1 Labeling of data 5 Test enclosure and test equipment 5.1 Test enclosure 5.1.1 Unwanted stimuli 5.1.2 Type 1 “Anechoic-Chamber” |
| 19 | 5.1.3 Type 2 “Test-Box” 5.2 Measurement configuration 5.2.1 General 5.2.2 Measurement configuration for non-directional hearing aids 5.2.2.1 General |
| 22 | 5.2.3 Measurement configuration for directional hearing aids |
| 23 | 5.3 Sound source system |
| 24 | 5.4 Measurement system for the sound pressure level and harmonic distortion produced by a hearing aid 5.5 Direct-current measuring system |
| 25 | 5.6 Magnetic field source for SPLIV measurements 5.7 Magnetic field source for hearing aids having induction pick-up coil for use with a telephone |
| 26 | 6 Test conditions 6.1 Normal operating conditions for a hearing aid 6.1.1 General 6.1.2 Battery or supply voltage |
| 27 | 6.1.3 Settings of controls 6.1.3.1 General 6.1.3.2 Full-on gain (FOG) settings 6.1.3.3 Reference Test Settings (RTS) |
| 28 | 6.1.4 Ambient conditions 6.1.5 Sound outlet system 6.1.6 Accessories 7 Basic acoustic hearing aid measurements 7.1 General 7.2 Frequency response curves 7.3 OSPL90 frequency response curve |
| 29 | 7.4 Full-on gain response curve |
| 30 | 7.5 Basic frequency response curve 7.5.1 Test procedure 7.5.2 Frequency range |
| 31 | 7.5.3 Reference test gain (RTG) 7.6 Total harmonic distortion |
| 32 | 8 Special hearing aid measurements 8.1 General 8.2 Intermodulation distortion 8.3 Equivalent input noise (EIN) |
| 33 | 8.4 Equivalent input noise in one-third-octave bands |
| 35 | 8.5 Measurements applying to AGC hearing aids 8.5.1 General 8.5.2 Steady-state input-output characteristics |
| 36 | 8.5.3 AGC characteristics (attack and release time) |
| 37 | 8.6 Effects of tone control and gain control 8.6.1 Basic frequency response: effect of tone control 8.6.2 Frequency response: effect of gain control position 8.6.3 Characteristics of the gain control 8.7 Battery related measurements 8.7.1 General 8.7.2 Battery current measurement |
| 38 | 8.7.3 Effects of variation of battery or supply voltage and internal resistance 8.7.3.1 Full-on gain 8.7.3.2 OSPL90 8.7.3.3 Total harmonic distortion 8.7.3.4 Total intermodulation distortion |
| 39 | 9 Special measurements for hearing aids having non-acoustical inputs 9.1 General 9.2 Equivalence of output levels for a non-acoustical input 9.3 Measurement setup for “Wireless” input (WL) 9.3.1 General 9.3.2 Measurement setup |
| 40 | 9.3.3 Wireless Basic frequency response SPLWL 9.3.4 HFA-SPLWL 9.3.5 Frequency response with full-on gain control setting 9.3.6 Equivalency of wireless input sensitivity level (EWLS) 9.4 Hearing aids with electrical input 9.4.1 General |
| 41 | 9.4.2 Measurement setup 9.4.3 Basic frequency response (SPLEI) 9.4.4 HFA-SPLEI 9.4.5 Frequency response with full-on gain control setting 9.4.6 Equivalent electrical input sensitivity level (EEIS) 9.4.7 Connector system for electrical input |
| 42 | 9.5 Hearing aids having induction pick-up coil 9.5.1 General 9.5.2 Basic frequency response in a vertical magnetic field (SPLIV) 9.5.3 Frequency response with full-on gain control setting (full-on SPLIV) 9.5.4 Effect of gain control position on frequency response 9.5.5 Harmonic distortion |
| 43 | 9.5.6 HFA-SPLIV 9.5.7 Equivalent test loop sensitivity level (ETLS) 9.5.8 Full-on HFA-SPLIV 9.6 Hearing aids having induction pick-up coil for use with a telephone 9.6.1 SPLITS response curve |
| 44 | 9.6.2 HFA-SPLITS 9.6.3 Relative simulated equivalent telephone sensitivity level (RSETS) |
| 45 | 10 Measurement of the performance for production, supply and delivery quality assurance purposes 10.1 General 10.2 Nominal reference test gain 10.3 Nominal OSPL90 10.4 Nominal full-on gain 10.5 Nominal bandwidth frequencies f1 + f2 10.6 Nominal frequency response curve |
| 46 | 10.7 Nominal battery or supply voltage 10.8 Nominal battery current 10.9 Nominal total harmonic distortion |
| 47 | 10.10 Nominal equivalent input noise level 10.11 Nominal equivalent test loop sensitivity level (ETLS) 10.12 Nominal Full-on HFA SPLIV 10.13 Electrical Input impedance 10.14 Nominal equivalent electrical input sensitivity level 10.15 Nominal steady state input-output AGC characteristics 10.16 Nominal attack- and release time |
| 48 | 11 Maximum permitted expanded uncertainty of measurements |
| 49 | Annex A (normative) Substitution measurement method A.1 Introduction A.2 Measurement method A.3 Comparison of the substitution method |
| 51 | Annex B (normative) Effect of MLE on non-acoustical output hearing aids B.1 Definition of acoustic and non-acoustic input equivalence |
| 52 | B.2 In-situ equivalence measurement in case of known MLE |
| 53 | B.3 HFA equivalence of output levels for non-acoustical inputs |
| 54 | B.3.1 In-situ output level equivalency of wireless input sensitivity level (EWLS) B.3.2 In-situ output level equivalency of electrical input sensitivity level (EEIS) B.3.3 In-situ output level equivalency of test loop sensitivity level (ETLS) B.3.4 In-situ output level equivalency of telephone sensitivity level (RSETS) |
| 55 | Annex C (informative) Examples of uncertainty calculation C.1 Sound source system for test box C.2 Sound source system for test chamber |
| 56 | C.3 Hearing aid measurement |
| 58 | Bibliography |
