When the voice is properly used, the tones are consciously transmitted through the hard palate, the nasal bone, the sinuses, and the forehead. Some of the sound waves continue on through the frontal sinuses, cranial bone, spine, and ribs, to produce chest resonance, but the conscious action takes places in these four areas of the head and the more tonal action felt in these structures, the greater the chest resonance. When sound is transmitted in this way, we feel the vibratory-tonal actions.
