NF EN 60118-1 : 95 AMD 1 99

Committees responsible
National foreword
Foreword
1 Scope
2 Normative references
3 Definitions
4 Test conditions
      4.1 General
      4.2 Residual output level
      4.3 Magnetic field source
5 Test procedure
      5.1 Strength of magnetic field source
      5.2 Locating the hearing aid for test
      5.3 Normal operating conditions for the hearing aid
      5.4 Basic frequency response
      5.5 Frequency response with full-on gain control
             setting
      5.6 Maximum magneto-acoustical sensitivity level
             at the reference test frequency
      5.7 Effect of gain control position on frequency
             response
      5.8 Harmonic distortion
6 Equivalent acoustic input
Annex ZA (normative) Other international publications quoted
                     in this standard with the references of
                     the relevant European publications

Gives a method for determining the electroacoustic performance of hearing aids fitted with an induction pick-up coil and used in an audio-frequency magnetic field. The induction pick-up performance is measured in a loop simulating conditions of use in room applications.