We have applied high-resolution vocal frequential analysis to a popula
tion of singing voices. Two important elements have become apparent: (
1) Confirmation that the singing formant originates in the resonators.
This is observed especially on a low fundamental, and it is acquired
through technical skill and experience. (2) Observation of the vibrato
, which, isolated from the clinical study, regarding only its graphic
presentation, could have been interpreted as 'abnormal'.