Octave band

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What Wikipedia says

An octave band is a frequency band that spans one octave (). In this context an octave can be a factor of 2 or a factor of 10 0.3. To remove the ambiguity, an alternative name suggested for a factor of 100.3 is "dectave", a portmanteau of "decimal" and "octave".

Excerpt from the Wikipedia article “Octave band”, under the CC BY-SA 4.0 license. Read the article on Wikipedia