bn:00030342n
Noun Concept
Categories: All articles with vague or ambiguous time, IARC Group 2B carcinogens, Radio spectrum, Articles with short description
EN
extremely low frequency  ELF  Below Extremely Low Frequency Band  ELF wave  Extremely Low Frequencies
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EN
Extremely low frequency is the ITU designation for electromagnetic radiation with frequencies from 3 to 30 Hz, and corresponding wavelengths of 100,000 to 10,000 kilometers, respectively. Wikipedia
Electromagnetic radiation with frequencies from 3 to 30 Hz Wikipedia Disambiguation
The 3-30 Hz range of the electromagnetic spectrum Wikidata
The band of radio frequencies from 3 to 30 hertz. Wiktionary