An octave band is a frequency band that spans one octave.

(February 18, 1832 – November 23, 1910) a French-American civil engineer and aviation pioneer.

Interval spanning sixteen musical pitches.

(11 July 1821 – 29 December 1890) a French novelist and dramatist.

The short octave was a method of assigning notes to keys in early keyboard instruments (harpsichord, clavichord, organ), for the purpose of giving the instrument an extended range in the bass range.

(music) A musical interval of the Western twelve-semitone system consisting of twelve semitones and spanning eight degrees of the diatonic scale. It is enharmonically equivalent to an augmented seventh and is commonly referred to as an octave.

(music) In Ancient Greek music, a specific sequence of intervals within an octave.

Perception of same pitch class.

Eight notes, same pitch class.