The magnetic fields with frequency of 100 Hz and intensity up to 100 gausses are known as the field magnetic extremely low frequency (ELF).

• 频率在100Hz；强度最高达100高斯的磁场被称为超低频磁场(Extremely Low frequency；ELF)；它对于细胞膜有着特殊的影响；能够改变细胞膜两侧的离子分布；从而在某些创伤或是变性的组织产生的炎症反应中表现出治疗效应.