ultralow frequency


Definition of ultralow frequency

  1. :  a radio frequency in the lower range of the radio spectrum from about 300 Hz to 3 kHz Communicating with subs thousands of miles away, under thousands of feet of ocean, requires ultralow frequencies … — Noah Shachtman, Wired, August 2009 —abbreviation ULF — see radio frequency table

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capable of being understood in two ways

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