The Balanced Release – In the properly executed onset-release cycle, the quality of vocal sound will be consistent from beginning to end. The glottis neither tightens nor remains in any of the whispering postures at the onset of phonation, nor does it assume those postures at phrase termination.
In order to achieve a balanced release, it is not necessary to change dynamic level, although musical factors may times convince one to do so. Furthermore, there is no need to diminish dynamic level in order to avoid the hard release. The perfectly balanced release can be demonstrated in the following exercise.
Give a genuine “ha ha ha ha ha” type of laugh, listening carefully to the termination of each individual syllable; every syllable should end as distinctly as it began. Within this laughter vocalise (on each of its syllables) are four important aspects of good singing: balanced onset of phonation, consistency of quality throughout the duration of tone, balanced release, and optimum condition for the continuation of efficient phonation.
Richard Miller, The Structure of Singing: System and Art in Vocal Technique, 1996 Schirmer, Cengage Learning