Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components (IEC 62489-1:2010); German version EN 62489-1:2010— 21 стр.
Hearing aids - Part 2: Hearing aids with automatic gain control circuits (IEC 60118-2:1983 + A1:1993 + A2:1997); German version EN 60118-2:1995 + A2:1997— 14 стр.
Electroacoustics. Audio-frequency induction loop systems for assisted hearing. Methods of measuring and specifying the performance of system components— 32 стр.
Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components (IEC 62489-1:2010 + A1:2014); German version EN 62489-1:2010 + A1:2015— 31 стр.
Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components (IEC 62489-1:2010 + A1:2014 + A2:2017); German version EN 62489-1:2010 + A1:2015 + A2:2018— 34 стр.
