So far a large number of ooks on music have published at home and abroad. In
the field of the vocal music have come out innumerable studies, in most
of which the vovalization for exapmle should be performed almost totaly
in the diaphragm or the abdomen. As mentioned in this study, this is the
vocalization method in the resonance area Picture A, centered around the
diaphragm. However, the resonance area, Picture B, larger in area than
Picture A, shows that the resonance goes physically much larger with the
vocalization in the delicate way of viblation caused by the flexible reation(knee
reation) , of course under consideration of the diaphragm excercise. Morever,
in order to enlarge the movement of the Picture B, the paramera viblation
helps the resonance to be produced even larger. On the contrary, subtly
reaction the knee, the voice volume is controlled.
The above mentioned is thought to be the change of the source.