頻率化分如下
極低頻 ELF (Extremely Low Frequency) 3-30Hz 　
超低頻 SLF (Super Low Frequency) 30-300Hz 　　
特低頻 ULF (Ultra Low Frequency) 300-3000Hz 　　
甚低頻 VLF (Very Low Frequency) 3-30KHz 　　
低頻 LF ( Low Frequency) 30-300KHz 　　
中頻 MF (Medium Frequency) 300-3MHz 　　
高頻 HF (High Frequency) 3-30MHz 　　
甚高頻 VHF (Very High Frequency) 30-300MHz 　
特高頻 UHF (Ultra High Frequency) 300-3000MHz 　　
超高頻 SHF (Super High Frequency) 3-30GHz 　　
極高頻 EHF (Extremely High Frequency) 30-300GHz