mumetal

Figure 16 compares a 30-mil thickness of Mumetal with various materials at several frequencies.

从图中可以看出：与其它材料相比，频率低于1kHz时，导磁合金的性能最优；

It shows that, below 1 kHz, Mumetal is more effective than any of the other materials, while at 100kHz it is the least effective.

而频率为100kHz时，导磁合金的性能最差。