Definitions for **"Octave Band"**

A frequency interval whose maximum value is twice the minimum value

This is a continuous band of frequencies which span a range such that the highest frequency in the band is twice the lowest frequency. The audio frequency range is separated into octave bands as a matter of convenience, and each band is individually specified by its center frequency, e.g. 63 Hz, 125 Hz, 250 Hz, 500 Hz 1 kHz, 2 kHz, 4 kHz, 8 kHz, and 16 kHz.

A range of frequency where the highest frequency of the band is double the lowest frequency of the band. The band is usually specified by the center frequency.