
Electroacoustics - Audio-Frequency Induction Loop Systems For Assisted Hearing - Part 1: Methods Of Measuring And Specifying The Performance Of System Components
出版:Asociacion Espanola de Normalizacion

专家解读视频
2011 [09/02/2011]
EN 62489-1:2010 - Identical
IEC 62489-1 : 1.1 - Identical
EN 62489-1 : 2010 AMD 2 2018 - Identical
EN 62489-1 : 2010 - Identical
IEC 62489-1 : 1.2 - Identical