消磁

Definition form Wikipedia: A degauss causes a magnetic field to oscillate rapidly, with decreasing amplitude.

摘自维基百科定义：消磁器产生幅度递减快速交变磁场。

Wait, can you check these sunglasses? I bought it in the second floor. I think they forgot to demagnetize it.

等一下，您这副太阳镜吗？我在二楼买。我想他们忘了给它消磁了。