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An octave band is a frequency band that spans one octave (). In this context an octave can be a factor of 2[1][full citation needed] or a factor of 10 0.301.[2][full citation needed][3][full citation needed] An octave of 1200 cents in musical pitch (a logarithmic unit) corresponds to a frequency ratio of 2/ 1 ≈ 10 0.301 .
A general system of scale of octave bands and one-third octave bands has been developed for frequency analysis in general, most specifically for acoustics. A band is said to be an octave in width when the upper band frequency is approximately twice the lower band frequency.
- ^ Crocker (1997). [no title cited]. John Wiley & Sons. p. 1325. ISBN 978-0-471-25293-1. Archived from the original on 5 December 2017 – via Google books.
- ^ IEC 61260-1:2014[full citation needed]
- ^ IANSI S1-6-2016[full citation needed]