Very low frequency (VLF) is a radio frequency band in the range of 3 to 30 kHz with wavelengths from 10 to 100 km . It is also the name of the band designated by the International Telecommunication Union (ITU).
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Extremely Low Frequency Emission Hazards: During the 1990s, most electromagnetic frequency (EMF) research focused on extremely low frequency (ELF) exposures stemming from conventional power sources, such as power lines, electrical substations, or home appliances .
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