Female chest register singers only have a low diapason of an octave to 12 notes.
From the en.wikipedia.org
There is some evidence that once again, the diapason of opinion is being changed.
From the scienceblogs.com
In 1866 oxen began hauling the logs which formed its 32-foot diapason, its tiny flutinos.
From the time.com
Superius vero tetrachordum, quod est diatessaron, requirunt, ut unusquisque suam speciem diapason teneat, per quam evagando, sursum ac deorsum libere currat.