Octave (electronics)
Relative unit corresponding to doubling of frequency / From Wikipedia, the free encyclopedia
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In electronics, an octave (symbol: oct) is a logarithmic unit for ratios between frequencies, with one octave corresponding to a doubling of frequency. For example, the frequency one octave above 40 Hz is 80 Hz. The term is derived from the Western musical scale where an octave is a doubling in frequency.[note 1] Specification in terms of octaves is therefore common in audio electronics.
Along with the decade, it is a unit used to describe frequency bands or frequency ratios.[1][2]