2017IEC 60118-4:2014/AMD1:2017 Amendment 1 - Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements
2014IEC 60118-4:2014 Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - System performance requirements
2006IEC 60118-4:2006 Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength
1998IEC 60118-4/AMD1:1998 Hearing aids - Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes; Amendment 1
1981IEC 60118-4:1981 Hearing aids. Part 4 : Magnetic field strength in audio-frequency induction loops for hearing aid purposes
IEC 60118-4/AMD1:1998 Hearing aids - Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes; Amendment 1 was changed to IEC 60118-4:2006 Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength.