From beginning to end Jeannette's voice rose a full octave in the three words.

With each new line of the chant, she raised her pitch exactly one half step, until she had covered a full octave.

His words came out a full octave higher than usual.

But it had gone up a full octave.

I'd lowered the volume on my voice, but the pitch was still a full octave higher than normal.

Amazingly, her voice rose another full octave as she scrambled up to stand on the divan.

Maskim gasped, his voice a full octave higher than before.

She also has a talent for locks and can reach a full octave on a piano.

King Carrathal's voice rose a full octave as he paced in his chambers.

The spurt of sound had dropped a full octave.