Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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audio frequency the range of frequencies of normally audible sound, or the corresponding electronic frequencies; usu. from about fifteen or twenty to 20,000 cycles per second. [2 definitions]
frequency distribution a table of statistical data in which the observed values of a variable are grouped into classes, and the frequencies for each class are given.
frequency modulation see FM.
high frequency a radio wave between three and thirty megahertz.
low frequency any radio frequency between thirty and three hundred kilohertz per second.
medium frequency any radio wave with a frequency of between three hundred and three thousand kilohertz.
superhigh frequency any radio frequency between 3,000 and 30,000 megahertz.
ultrahigh frequency any radio frequency between three hundred and three thousand megahertz. (abbr.: UHF)
very high frequency any radio frequency ranging between thirty and three hundred megahertz. (abbr.: VHF)
very low frequency any radio frequency between ten and thirty kilohertz. (abbr.: VLF)