bn:00030342n
Noun Concept
Categories: Articles with short description, IARC Group 2B carcinogens, All articles with vague or ambiguous time, Radio spectrum
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extremely low frequency  ELF  Below Extremely Low Frequency Band  ELF wave  Extremely Low Frequencies
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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