Comment Comment by News-Dog This Post points to the Article Titled Extremely Low Frequency (ELF) : https://en.wikipedia.org/wiki/Extremely_low_frequencyAnd Not to; Low Frequency (LF) : https://en.wikipedia.org/wiki/Low_frequency parent News-Dog 3 years ago
And Not to; Low Frequency (LF) : https://en.wikipedia.org/wiki/Low_frequency