BS EN 62489-2:2014
電聲學.助聽用音頻感應環系統.用于評估人體照射限值指南符合性的,環發射低頻磁場的計算和測量方法
Electroacoustics. Audio-frequency induction loop systems for assisted hearing. Methods of calculating and measuring the low-frequency magnetic field emissions from the loop for assessing conformity with guidelines on limits for human exposure