toneless

It was these voiceless spectres of a voice long dead that stirred the transparent silence, intoning toneless tones.

Methods vary greatly as to the length of time devoted to toneless drills in breathing and breath-control.

As in the "opposed muscular" system, the initial exercises are toneless drills in breathing.

Example 1: The student takes a few preliminary toneless breaths.

Considerable practice and close attention are required in order to hold back the breath in toneless breathing exercises.