The fact that male voices are more often throaty in the upper register then female voices calls for special comment.
The following diagram showing the relationship of the two voices will help to elucidate the matter.
I have here used three octaves of the vocal compass as sufficient for the illustration. Remembering that the male voice is an octave lower than the female voice we shall see that the female voice is a continuation, as it were, of the male voice; the lower part of the female compass overlapping the upper part of the male compass, the two having approximately an octave G to G in common. Further it will be seen that both male and female voices do about the same thing at the same absolute pitches. At about E flat or E above middle C the alto or soprano passes from the chest to the middle register. It is at the same absolute pitches that the tenor passes from what is usually called open to covered tone, but which might better be called from chest to head voice. There is every reason to believe that the change in the mechanism is the same as that which occurs in the female voice at the same pitches. That there is oftentimes a noticeable readjustment of the mechanism in uncultivated voices at these pitches no observing teacher will deny, and these are the voices which are of special interest to the teacher, and the ones for which books are made. It will be observed that this change in the male voice takes place in the upper part of his compass instead of in the lower, as in the female voice. This change which is above the compass of the speaking voice of the tenor or baritone, adds greatly to its difficulty. For this reason the training of the male head voice requires more care and clearer judgment than anything else in voice training.
In treating this part of the female voice we have learned that if the heavy, or chest voice, is carried up to G or A above middle C it weakens the tones of the middle register until they finally become useless. Then the chest tones become more difficult and disappear one by one and the voice has no further value. Identically the same thing happens to the tenor who, by reason of sufficient physical strength forces his chest voice up to G, A, or B flat. He may be able to continue this for awhile, sometimes for a few years, but gradually his upper tones become more difficult and finally impossible and another vocal wreck is added to the list.
In restoring the female voice that has carried the chest voice too high it is necessary to carry the middle register down, sometimes as low as middle C until it has regained its power. The tenor or baritone must do essentially the same thing. He must carry the head voice, which is a lighter mechanism than the chest voice, down as low as this c
using what is often called mixed voice. When the pitches
