DIN EN 62489-2-2011 电声学.辅助听力音频感应环路系统.第2部分:评估人体照射与指南一致的环路低频磁场放射的计算和测量方法
Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 2: Methods of calculating and measuring the low-frequency magnetic field emissions from the loop for assessing conformity with guidelines on limits for human exposure (I