The Head Voice is used as the singer ascends in the musical scale. “Head Voice” begins, according to Garcia, at the note on the scale when only the ligament portion of the vocal chords vibrate. This is only relevant to “IGC”. Garcia points out that the effect is also found in “Chest Voice”, but notes no change of terminology resulting from this effect as one ascends through the “Chest Register” in “Chest Voice”/“CGC”. The words Chest Voice indicate “CGC” no matter what part of the vocal chords are involved in this function.
