c. The Middle register which, according to some authors, gets

its resonance from the pharynx. At the altitude of E it breaks and gives origin to the head register.

d. The second break of the voice.

e. The head register, which gets its resonance from the head.

The second illustration in Figure 13 shows the defects of the voice, resulting from its breaks into register, emphasized by colors, and referred to herewith by letters.

a. Chest register, produced by an exaggerated power and tension.

b. Starting point of the first break. Change in the quality and volume of the voice.