[消磁磁场] demagnetic field 当地质体被外磁场磁化时，共内部除存在外磁场外，还能产生一个与外磁场方向相反的磁场，这个磁场称为消磁磁场。用符号He表示。它相当于分布在地质体表面上假想的磁化“磁荷”在地质体内部产生的磁场。其大小与地质体磁化强度J成正比，但方向相反。
消磁是在部署前进行为了去除舰艇金属外壳上残留的磁场，以免在运行过程中被其它潜艇和水面舰艇发现。
Demagnetization is conducted before deployment to remove residual magnetic fields in the metal of a vessel to make it harder to detect by other submarines and surface ships.
海军部研究实验室开始研制消磁系统以抑制我们舰艇的磁场，从而达到保护舰艇的目的。
Arl began work on developing degaussing systems to neutralize our ships' magnetic fields and thus protect them.
上文探讨了载流屏蔽体的效果——让包围导线的屏蔽层带有大小相等、方向相反的电流，从而抵消磁场，降低干扰。
We have discussed the role of a current-driven shield carrying an equal and opposite current to reduce generated noise by reducing the magnetic field around a conductor.
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